OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..52
MATHEMATICA
Table[Sum[StirlingS2[n, k]StirlingS2[n+1, k+1], {k, 0, n}], {n, 0, 100}]
Total/@Table[StirlingS2[n, k]StirlingS2[n+1, k+1], {n, 0, 20}, {k, 0, n}] (* Harvey P. Dale, Dec 15 2023 *)
PROG
(Maxima) makelist(sum(stirling2(n, k)*stirling2(n+1, k+1), k, 0, n), n, 0, 24);
CROSSREFS
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 04 2011
STATUS
approved