A367777 a(n) = |Stirling1(2*n + 1, n)|.

0, 2, 50, 1624, 67284, 3416930, 206070150, 14409322928, 1146901283528, 102417740732658, 10142299865511450, 1103230881185949736, 130770928736755873500, 16778377273555183648050, 2316762871029690607422990, 342563613932937660652700640, 54005406709047719373010498320

Offset

0,2

Links

Paolo Xausa, Table of n, a(n) for n = 0..300

Formula

a(n) = [x^n] Pochhammer(x, 2*n + 1).

Maple

seq(abs(Stirling1(2*n + 1, n)), n = 0..16);

Mathematica

A367777[n_]:=Abs[StirlingS1[2n+1, n]];
Array[A367777, 20, 0] (* Paolo Xausa, Nov 30 2023 *)

Prog

(PARI) a(n) = abs(stirling(2*n+1, n, 1)); \\ Michel Marcus, Nov 30 2023

Crossrefs

Cf. A132393.

Sequence in context: A080263 A221241 A246071 * A088920 A278456 A231043

Adjacent sequences: A367774 A367775 A367776 * A367778 A367779 A367780

Keyword

nonn

Author

Peter Luschny, Nov 29 2023

Status

approved