Lah Number Calculator

C(n-1,k-1) · n!/k!

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About Lah Number Calculator

A Lah number calculator computing L(n,k) = C(n-1,k-1)·n!/k!. Lah numbers count the number of ways to partition {1,...,n} into k non-empty linearly ordered subsets. They connect rising and falling factorials. L(n,1)=n!, L(n,n)=1. Client-side.

Lah Number Calculator Features

  • L(n,k) value
  • Triangle
  • Factorial link
  • Rising/falling
  • Row sums

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