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A192547
sum(stirling1(n,k)*stirling1(n+1,k+1),k=0..n).
1
1, 1, 4, 41, 746, 20952, 837222, 45064203, 3140545942, 274969698158, 29537121873656, 3818716753252766, 584845275604394884, 104699320897565702206, 21661251169082551846770, 5128537368950263252563795, 1377694241395636643874812070
OFFSET
0,3
LINKS
MATHEMATICA
Table[Sum[StirlingS1[n, k]StirlingS1[n+1, k+1], {k, 0, n}], {n, 0, 100}]
PROG
(Maxima) makelist(sum(stirling1(n, k)*stirling1(n+1, k+1), k, 0, n), n, 0, 24);
CROSSREFS
Sequence in context: A270703 A363302 A361182 * A006129 A244437 A265003
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 04 2011
STATUS
approved