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.

A355217 E.g.f. A(x) satisfies A'(x) = 1 + A(2 * (1 - exp(-x)))/2.

Original entry on oeis.org

1, 1, 1, -1, -19, -153, -1155, -9785, -183075, -25013497, -11301739395, -10911778097209, -21604455470794723, -86776403662147521913, -702894028759616525605187, -11441974451382622345470900921, -373552937787342469475481963377571
Offset: 1

Views

Author

Seiichi Manyama, Jun 24 2022

Keywords

Crossrefs

Programs

  • PARI
    a_vector(n) = my(v=vector(n)); v[1]=1; for(i=1, n-1, v[i+1]=sum(j=1, i, (-1)^(i-j)*2^(j-1)*stirling(i, j, 2)*v[j])); v;

Formula

a(1) = 1; a(n+1) = Sum_{k=1..n} (-1)^(n-k) * 2^(k-1) * Stirling2(n,k) * a(k).