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A086895 a(n) = 1/3!*(A000522(3*n) + 3*A000522(n) + 2). 1
1, 4, 329, 164410, 217010257, 592437912176, 2900576017215049, 23146596617368286854, 281092269321320392419425, 4933169326589172885999647452, 120172004795712251502939402381001, 3933950748992436265200224114943085394, 168530450086835969601177601081838249796529 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..100

PROG

(PARI) \\ here b(n) is A000522(n).

b(n)={sum(k=0, n, binomial(n, k)*k!)}

a(n)={(b(3*n) + 3*b(n) + 2) / 6} \\ Andrew Howroyd, Jan 27 2020

CROSSREFS

Cf. A000522, A008290.

Sequence in context: A195501 A075768 A135442 * A293241 A220646 A173367

Adjacent sequences:  A086892 A086893 A086894 * A086896 A086897 A086898

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Aug 22 2003

EXTENSIONS

Terms a(11) and beyond from Andrew Howroyd, Jan 27 2020

STATUS

approved

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Last modified September 22 16:44 EDT 2020. Contains 337291 sequences. (Running on oeis4.)