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A192567 a(n) = sum(abs(stirling1(n+1,k+1))*stirling2(n+1,k+1)*k!^2,k=0..n). 0
1, 2, 15, 263, 8450, 432514, 32308948, 3317537208, 448304831744, 77131843774416, 16463316260454624, 4269057157148962320, 1321883141629335120576, 481761671427370573812000, 204137795884403682574690176, 99514256070766872294586292544 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

MATHEMATICA

Table[Sum[Abs[StirlingS1[n+1, k+1]]StirlingS2[n+1, k+1]k!^2, {k, 0, n}], {n, 0, 100}]

PROG

(Maxima) makelist(sum(abs(stirling1(n+1, k+1))*stirling2(n+1, k+1)*k!^2, k, 0, n), n, 0, 24);

CROSSREFS

Sequence in context: A102555 A264907 A195737 * A143886 A174482 A076111

Adjacent sequences:  A192564 A192565 A192566 * A192568 A192569 A192570

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 04 2011

STATUS

approved

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Last modified May 28 15:33 EDT 2020. Contains 334684 sequences. (Running on oeis4.)