id:A035265 - OEIS Search Results

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One half of deca-factorial numbers.

+0
4

1, 12, 264, 8448, 354816, 18450432, 1143926784, 82362728448, 6753743732736, 621344423411712, 63377131187994624, 7098238693055397888, 865985120552758542336, 114310035912964127588352 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)= (Pochhammer(2/10,n)*10^n)/2.`
	LINKS	`Index entries for sequences related to factorial numbers`
	FORMULA	`2a(n) = (10n-8)(!^10) := product(10j-8, j=1..n)= 2^nA008548(n), A008548(n)=(5n-4)(!^5) := product(5j-4, j=1..n); E.g.f. (-1+(1-10*x)^(-1/5))/2.`
	CROSSREFS	`Cf. A008548, A045757, A035272-A035279.` `Sequence in context: A053324 A138451 A113672 this_sequence A068271 A068283 A003390` `Adjacent sequences: A035262 A035263 A035264 this_sequence A035266 A035267 A035268`
	KEYWORD	`easy,nonn`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)`

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.

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