unsigned) Lah numbers are coefficients expressing rising factorials in terms of falling factorials and vice versa. They were discovered by Ivo Lah in 1954...

Incomplete beta function Incomplete gamma function Jordan–Pólya number Kempner function Lah number Lanczos approximation Lozanić's triangle Macaulay representation...

KAI LAH (Light Armed Helicopter) is a compact twin-engine combat helicopter that is being developed by Korea Aerospace Industries (KAI). The LAH has been...

of Lah-Toh within the boundary of Kootenai County. Unaware of Lah-Toh's abolishment, residents of Moscow attempted to organize the county of Lah-Toh...

Kehlani Ashley Parrish (/kəˈlɑːni, keɪˈlɑːni/ kə-LAH-nee, kay-LAH-nee; born April 24, 1995) is an American singer, songwriter and dancer. They are originally...

permutations, combinations, multisets, and partitions either of a set or of a number. The idea of the classification is credited to Gian-Carlo Rota, and the...

A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that...

(n-k+1)!)={\binom {n-1}{k-1}}{\frac {n!}{k!}}=L(n,k)} which gives the Lah number. Touchard polynomial T n ( x ) = ∑ k = 0 n { n k } ⋅ x k {\displaystyle...

In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number...

released the results as the album Foo Fighters in 1995. The album peaked at number 23 on the Billboard 200, earning a platinum certification in the United...

month, the number of pairs of rabbits is equal to the number of mature pairs (that is, the number of pairs in month n – 2) plus the number of pairs alive...

the number 1 differently than larger numbers, sometimes even not as a number at all. Euclid, for example, defined a unit first and then a number as a...

in this context. They got sell Nasi Lemak lah, Roti Canai lah, Chapatti lah; Everything got lah! Although lah can appear nearly anywhere, it cannot appear...

A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly it is a positive integer that has...

mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form Mn = 2n − 1 for some integer...

that is both a left-truncatable and right-truncatable prime. The row sum of Lah numbers of the form L ( n , k ) = ⌊ n k ⌋ {\displaystyle L(n,k)=\textstyle...

In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with...

Lithium aluminium hydride, commonly abbreviated to LAH, is an inorganic compound with the chemical formula Li[AlH4] or LiAlH4. It is a white solid, discovered...

highly composite number is a positive integer that has more divisors than all smaller positive integers. If d(n) denotes the number of divisors of a positive...

triangular number or triangle number counts objects arranged in an equilateral triangle. Triangular numbers are a type of figurate number, other examples...

In mathematics, a polygonal number is a number that counts dots arranged in the shape of a regular polygon: 2-3 . These are one type of 2-dimensional figurate...

Thursday, 3 Rabi' al-awwal in AD 985 (AH 375). His father, caliph al-'Azīz bil-Lāh, had two consorts. One was an umm al-walad who is only known by the title...

the first kind and the Stirling numbers of the second kind. Additionally, Lah numbers are sometimes referred to as Stirling numbers of the third kind....

numbers two terms apart in the Fibonacci sequence results in the Lucas number in between. The first few Lucas numbers are 2, 1, 3, 4, 7, 11, 18, 29, 47...

In number theory, a happy number is a number which eventually reaches 1 when the number is replaced by the sum of the square of each digit. For instance...

In number theory, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. A...

In mathematics, a Harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that...

In mathematics, a double Mersenne number is a Mersenne number of the form M M p = 2 2 p − 1 − 1 {\displaystyle M_{M_{p}}=2^{2^{p}-1}-1} where p is prime...

In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the sieve of Eratosthenes...

In number theory, an n-smooth (or n-friable) number is an integer whose prime factors are all less than or equal to n. For example, a 7-smooth number is...