A192559 a(n) = sum(stirling1(n,k)^2*k!, k=0..n).

1, 1, 3, 28, 518, 15446, 669422, 39529008, 3040944216, 294858211992, 35128012184232, 5038597437006816, 855820352688929520, 169777212251996740080, 38880302912575002130800, 10176193922326946712143616, 3017694882032205124404127104

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..250

Mathematica

Table[Sum[StirlingS1[n, k]^2k!, {k, 0, n}], {n, 0, 100}]

Prog

(Maxima) makelist(sum(stirling1(n, k)^2*k!, k, 0, n), n, 0, 24);

Crossrefs

Sequence in context: A355473 A180710 A005328 * A161971 A156315 A248571

Adjacent sequences: A192556 A192557 A192558 * A192560 A192561 A192562

Keyword

nonn

Author

Emanuele Munarini, Jul 04 2011

Status

approved