A294340 E.g.f.: exp(Sum_{n>=1} A081362(n)*x^n/n).

1, -1, 1, -3, 15, -75, 435, -3045, 29505, -305865, 3193785, -36542835, 501892335, -7286043555, 108056360475, -1793622856725, 32996752625025, -620276725767825, 11975531764755825, -249801487147455075, 5592450521376068175, -130966142569782327675

Offset: 0

Author

Seiichi Manyama, Oct 28 2017

Keywords

• sign

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..444

Crossrefs

Cf. A294261.

Formula

a(0) = 1 and a(n) = (n-1)! * Sum_{k=1..n} A081362(k)*a(n-k)/(n-k)! for n > 0.