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A192551 a(n) = sum(abs(stirling1(n+1,k+1))*k!^2,k=0..n) 1
1, 2, 9, 77, 1150, 27394, 957040, 45996880, 2904500048, 232935169536, 23114775120624, 2779720331819760, 398266855573740192, 67024510463455711776, 13090037070947651891136, 2936252114196522165716544, 749684382637966175707918848 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) ~ sqrt(e)*(n!)^2. - Vaclav Kotesovec, Jan 02 2013
MATHEMATICA
Table[Sum[Abs[StirlingS1[n+1, k+1]]k!^2, {k, 0, n}], {n, 0, 100}]
PROG
(Maxima) makelist(sum(abs(stirling1(n+1, k+1))*k!^2, k, 0, n), n, 0, 24);
CROSSREFS
Sequence in context: A277406 A182947 A006041 * A121131 A166891 A184894
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 04 2011
STATUS
approved

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Last modified February 26 09:21 EST 2024. Contains 370338 sequences. (Running on oeis4.)