A134981 a(n) = A000110(n)*A000166(n).

1, 0, 2, 10, 135, 2288, 53795, 1625958, 61408620, 2823039912, 154822101975, 9964508664900, 742498325393077, 63327680888719284, 6122351446047588778, 665295048647712247030, 80666327472879792796515, 10842875860595742916865856, 1606496634499026283898516527

Offset

0,3

Links

Table of n, a(n) for n=0..18.

Formula

E.g.f.: A(x) = Sum_{n>=0} exp(-1-n*x)/(n!*(1-n*x)).

Crossrefs

Cf. A064312.

Sequence in context: A118183 A134051 A075199 * A087417 A270589 A171214

Adjacent sequences: A134978 A134979 A134980 * A134982 A134983 A134984

Keyword

easy,nonn

Author

Vladeta Jovovic, Feb 04 2008

Extensions

More terms from Olaf Voß, Feb 10 2008

Status

approved