A303614 - OEIS

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A303614

a(n) = [x^n] (1/5040 * Sum_{k=0..n} (k+7)!*x^k)^(1/4).

3

1, 2, 12, 100, 1016, 11904, 155896, 2237264, 34713216, 576780384, 10190672448, 190437245568, 3748465227360, 77458688700864, 1675826429735808, 37874833476394368, 892480151181131520, 21889831041022132224, 557997984025699216128

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

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

PROG

(PARI) N=66; x='x+O('x^N); Vec((1/7!*sum(k=0, N, (k+7)!*x^k))^(1/4))

CROSSREFS

Cf. A049388, A303569.

Sequence in context: A151392 A000888 A079821 * A124102 A168365 A055865

Adjacent sequences: A303611 A303612 A303613 * A303615 A303616 A303617

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Apr 27 2018

STATUS

approved