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A190877 E.g.f. exp(x+x^5). 0
1, 1, 1, 1, 1, 121, 721, 2521, 6721, 15121, 1844641, 20013841, 119845441, 519072841, 1816454641, 223394731561, 3501661887361, 29675906201761, 177923109591361, 844925253766561, 104750282797418881 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(n)=n!*sum(j=0..n/4, binomial(n+(-4)*j,j)/(n+(-4)*j)!).

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Exp[x+x^5], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jan 25 2015 *)

PROG

(Maxima)

a(n):=n!*sum(binomial(n+(-4)*j, j)/(n+(-4)*j)!, j, 0, n/4);

CROSSREFS

Sequence in context: A020229 A141350 A235408 * A293566 A293507 A306452

Adjacent sequences:  A190874 A190875 A190876 * A190878 A190879 A190880

KEYWORD

nonn

AUTHOR

Vladimir Kruchinin, May 23 2011

STATUS

approved

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Last modified August 18 15:00 EDT 2019. Contains 326106 sequences. (Running on oeis4.)