A081050 Generalized Stirling numbers of the first kind.

1, 0, 5, 5, 74, 154, 2484, 8028, 149904, 663696, 14257440, 80627040, 1965444480, 13575738240, 370643938560, 3031488633600, 91657072281600, 867718162483200, 28779361764249600, 309920046408806400, 11185850044938240000

Offset: 0

Author

Paul Barry, Mar 05 2003

Keywords

• easy
• nonn

Crossrefs

Cf. A081049, A008275.

Formula

a(n) = s(n, 1) - (-1)^(n+1)*s(n, 2), s(n, m) = signed Stirling numbers of first kind a(n) = abs(n!*(1 + Sum {k=1..n, (-1)^n*1/k} ))