A192548 a(n) = sum(abs(stirling1(n,k))*stirling2(n+1,k+1),k=0..n).

1, 1, 4, 33, 426, 7670, 181000, 5376777, 195238792, 8472419484, 431606519268, 25440239275308, 1714357181128372, 130748750027622922, 11188498960336877296, 1066226987215138587095, 112415085220156146401380, 13037223283297354475403696

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..47

Mathematica

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

Prog

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

Crossrefs

Cf. A047793.

Sequence in context: A216135 A052885 A277184 * A119821 A102321 A268293

Adjacent sequences: A192545 A192546 A192547 * A192549 A192550 A192551

Keyword

nonn

Author

Emanuele Munarini, Jul 04 2011

Status

approved