id:A085687 - OEIS Search Results

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G.f.: 8/(1+sqrt(1-8*x))^3.

+0
3

1, 6, 36, 224, 1440, 9504, 64064, 439296, 3055104, 21498880, 152807424, 1095450624, 7911587840, 57511157760, 420459724800, 3089600348160, 22806128885760, 169033661153280, 1257467341701120, 9385880636620800, 70271680244613120, 527595313582571520 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`6(n+1)2^(n-2)Cat(n+2)/(2n+3), where Cat(n)=A000108(n). - Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 11 2004` `G.f.: c(2x)^3, where c(x) is the g.f. of A000108; a(n)=3(n+1)2^n*Cat(n+1)/(n+3); - Paul Barry (pbarry(AT)wit.ie), Dec 08 2004`
	CROSSREFS	`Cf. A002421.` `Adjacent sequences: A085684 A085685 A085686 this_sequence A085688 A085689 A085690` `Sequence in context: A082309 A004319 A129324 this_sequence A129327 A099252 A057395`
	KEYWORD	`nonn`
	AUTHOR	`njas, Jul 13 2003`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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