A275871 Row sums and second diagonal of A046934.

1, 1, 4, 15, 61, 272, 1317, 6865, 38278, 227093, 1426921, 9457918, 65898275, 481177881, 3672102116, 29218285875, 241873478425, 2079079678176, 18524191138689, 170803860905237, 1627465240969382

Offset: 0

Author

Olivier Gérard, Aug 11 2016

Keywords

• nonn
• easy

Comments

The offset corresponds to the definition of A046934.

Differences of A032346 and of A032347.

Crossrefs

Cf. A046934, A046935, A032346, A032347.

Cf. A005493 (first differences of Bell numbers, second diagonal and row sum of A011971).

Programs

Mathematica

Clear[d]; d[0] = 1; d[1] = 0; d[n_] := d[n] =
  1 + Sum[Binomial[n - 1, j]*d[j], {j, 2, n - 1}]; Table[
d[n + 2] - d[n + 1], {n, 0, 22}] (* From the code by  J.-F. Alcover and Jon Perry in A032347 *)