Entringer Number Calculator

Alternating permutation refinement

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About Entringer Number Calculator

An Entringer number calculator computing E(n,k) via recurrence E(n,k)=E(n,k-1)+E(n-1,n-k). E(0,0)=1. Row sums give zigzag/tangent/secant numbers. E(n,n)=E_n (Euler zigzag numbers). Connected to alternating permutations. Client-side.

Entringer Number Calculator Features

  • E(n,k) value
  • Triangle
  • Zigzag link
  • Euler numbers
  • Recurrence

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