A086897 a(n) = 1/5!*(A000522(5*n)+10*A000522(3*n)+20*A000522(2*n)+45*A000522(n)+44).

1, 6, 82377, 29621978134, 55110944435590737, 351365336651946711055926, 6008600239785614025435195490441, 234070069565049957790986633184065559782, 18482397400123127114222085701577635920656730209, 2709724243821243799193362741406845754919489407774774182

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..50

Prog

(PARI) \\ here b(n) is A000522(n).
b(n)={sum(k=0, n, binomial(n, k)*k!)}
a(n)={(b(5*n) + 10*b(3*n) + 20*b(2*n) + 45*b(n) + 44) / 120} \\ Andrew Howroyd, Jan 27 2020

Crossrefs

Cf. A000522, A008290.

Sequence in context: A101439 A099112 A172750 * A034208 A003834 A152296

Adjacent sequences: A086894 A086895 A086896 * A086898 A086899 A086900

Keyword

nonn

Author

Vladeta Jovovic, Aug 22 2003

Extensions

Terms a(8) and beyond from Andrew Howroyd, Jan 27 2020

Status

approved