A154415 The middle Stirling numbers of first kind: a(n) = Stirling1(n, floor(n/2)).

1, 0, -1, 2, 11, -50, -225, 1624, 6769, -67284, -269325, 3416930, 13339535, -206070150, -790943153, 14409322928, 54631129553, -1146901283528, -4308105301929, 102417740732658, 381922055502195, -10142299865511450

Offset: 0

Author

Roger L. Bagula, Jan 09 2009

Keywords

• sign

Comments

The signless central Stirling numbers of the first kind Stirling1(2*n, n) are A187646.

Links

• G. C. Greubel, Table of n, a(n) for n = 0..300

Crossrefs

Cf. A048994, A187646.

Programs

Mathematica

Table[StirlingS1[n, Floor[n/2]], {n, 0, 30}]

PARI

a(n) = stirling(n, n\2, 1); \\ Michel Marcus, Sep 16 2016

Extensions

Name clarified by Peter Luschny, Jan 06 2020