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

0,3

Comments

The offset corresponds to the definition of A046934.

Differences of A032346 and of A032347.

Links

Table of n, a(n) for n=0..20.

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 *)

Crossrefs

Cf. A046934, A046935, A032346, A032347.

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

Sequence in context: A285363 A356942 A151484 * A007161 A352815 A007167

Adjacent sequences: A275868 A275869 A275870 * A275872 A275873 A275874

Keyword

nonn,easy

Author

Olivier Gérard, Aug 11 2016

Status

approved