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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
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
Sequence in context: A195501 A075768 A135442 * A293241 A220646 A352657
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 July 22 16:45 EDT 2024. Contains 374540 sequences. (Running on oeis4.)