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A034687
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Related to quintic factorial numbers A008548.
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5
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1, 15, 275, 5500, 115500, 2502500, 55412500, 1246781250, 28398906250, 653174843750, 15141780468750, 353308210937500, 8289154179687500, 195387205664062500, 4624163867382812500, 109823891850341796875
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OFFSET
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1,2
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COMMENTS
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Convolution of A034688(n-1) with A025750(n), n >= 1.
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LINKS
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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.
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FORMULA
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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.
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CROSSREFS
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Cf. A034255.
Sequence in context: A195615 A156091 A194728 * A159239 A199096 A060542
Adjacent sequences: A034684 A034685 A034686 * A034688 A034689 A034690
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KEYWORD
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easy,nonn
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AUTHOR
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Wolfdieter Lang
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STATUS
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approved
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