id:A034687 - OEIS Search Results

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Related to quintic factorial numbers A008548.

+0
6

1, 15, 275, 5500, 115500, 2502500, 55412500, 1246781250, 28398906250, 653174843750, 15141780468750, 353308210937500, 8289154179687500, 195387205664062500, 4624163867382812500, 109823891850341796875 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Convolution of A034688(n-1) with A025750(n), n >= 1.`
	LINKS	`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)=(5n-4)(!^5) := product(5j-4, j=1..n); G.f. (-1+(1-25x)^(-1/5))/5.`
	CROSSREFS	`Cf. A034255.` `Sequence in context: A013384 A013380 A013382 this_sequence A060542 A095654 A069405` `Adjacent sequences: A034684 A034685 A034686 this_sequence A034688 A034689 A034690`
	KEYWORD	`easy,nonn`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)`

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Last modified December 4 14:15 EST 2008. Contains 151279 sequences.

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