cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A363042 Row sums of A363041.

Original entry on oeis.org

1, 1, 2, 6, 17, 57, 233, 989, 4602, 23794, 129285, 751973, 4680041, 30523105, 210159654, 1521122754, 11481486845, 90604333205, 744420806913, 6348340033789, 56202980961206, 514994183598470, 4877587872447801, 47711923353493817, 481072714151555073, 4995769099914083313
Offset: 1

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Author

Peter Bala, May 14 2023

Keywords

Crossrefs

Programs

  • Maple
    seq(add( Stirling2(n+1,n-2*k)/binomial(n-2*k+1,2), k = 0..floor((n-1)/2) ), n = 1..30);
  • PARI
    a(n) = sum(k = 0, (n-1)\2, stirling(n+1, n-2*k, 2)/binomial(n-2*k+1, 2)); \\ Michel Marcus, May 21 2023

Formula

a(n) = Sum_{k = 0..floor((n-1)/2)} Stirling2(n+1,n-2*k)/binomial(n-2*k+1,2).