id:A161738 - OEIS Search Results

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Sequence related to the column sums of the BG2 matrix

+0
4

1, 1, 3, 15, 35, 315, 693, 9009, 19305, 328185, 692835, 14549535, 30421755, 760543875, 1579591125, 45808142625, 94670161425, 3124115327025, 6432002143875, 237984079323375, 488493636505875, 20028239096740875 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n) = product((2n-3-2k), k=0..floor(n/2-1))` `numer(a(n+2)/a(n+1)) = A005408(n) for n=>0.` `denom(a(n+2)/a(n+1)) = A093178(n) for n=>0..`
	CROSSREFS	`Cf. A161736, A005408 and A093178.` `Sequence in context: A019009 A162441 A001803 this_sequence A062741 A117561 A065765` `Adjacent sequences: A161735 A161736 A161737 this_sequence A161739 A161740 A161741`
	KEYWORD	`easy,nonn`
	AUTHOR	`Johannes W. Meijer (meijgia(AT)hotmail.com), Jun 18 2009`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research