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A192563 a(n) = Sum_{k=0..n} abs(Stirling1(n+1,k+1))*Stirling2(n+1,k+1)*k!. 2
1, 2, 13, 161, 3148, 87784, 3274640, 156359874, 9252910816, 662065322016, 56172251821992, 5562573507747288, 634574662217269824, 82482896750780978880, 12101565966159294983808, 1987899464090970683668944, 363036441677797499946379776 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
MATHEMATICA
Table[Sum[Abs[StirlingS1[n+1, k+1]]StirlingS2[n+1, k+1]k!, {k, 0, n}], {n, 0, 100}]
PROG
(Maxima) makelist(sum(abs(stirling1(n+1, k+1))*stirling2(n+1, k+1)*k!, k, 0, n), n, 0, 12);
CROSSREFS
Diagonal of the array A344639.
Sequence in context: A062593 A347051 A291140 * A014507 A132614 A187927
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 04 2011
STATUS
approved

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Last modified March 19 07:25 EDT 2024. Contains 370955 sequences. (Running on oeis4.)