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A034687 Related to quintic factorial numbers A008548. 5
1, 15, 275, 5500, 115500, 2502500, 55412500, 1246781250, 28398906250, 653174843750, 15141780468750, 353308210937500, 8289154179687500, 195387205664062500, 4624163867382812500, 109823891850341796875 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Convolution of A034688(n-1) with A025750(n), n >= 1.

LINKS

Table of n, a(n) for n=1..16.

W. Lang, On generalizations of Stirling number triangles, J. Integer Seqs., Vol. 3 (2000), #00.2.4.

FORMULA

a(n) = 5^(n-1)*A008548(n)/n!, A008548(n)=(5*n-4)(!^5) := product(5*j-4, j=1..n); G.f. (-1+(1-25*x)^(-1/5))/5.

CROSSREFS

Cf. A034255.

Sequence in context: A156091 A194728 A284077 * A159239 A279976 A199096

Adjacent sequences:  A034684 A034685 A034686 * A034688 A034689 A034690

KEYWORD

easy,nonn

AUTHOR

Wolfdieter Lang

STATUS

approved

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Last modified October 23 18:50 EDT 2018. Contains 316530 sequences. (Running on oeis4.)