A275871 - OEIS

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

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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