id:A008353 - OEIS Search Results

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2^n*(2^(n+1) - n - 1).

+0
4

1, 4, 20, 96, 432, 1856, 7744, 31744, 128768, 519168, 2085888, 8364032, 33501184, 134103040, 536625152, 2146959360, 8588820480, 34357379072, 137433972736, 549745328128, 2199001235456 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=sum{k=0..n+1, C(2n+2, 2k)-2k(n-k+1)*C(n+1, k)/n}, n>0. - Paul Barry (pbarry(AT)wit.ie), Feb 24 2005`
	CROSSREFS	`a(n) = A066345(2n+1).` `a(n) = 1 for n=0, 4 A008464(n-2) else.` `Sequence in context: A166175 A094971 A099025 this_sequence A057087 A151254 A098225` `Adjacent sequences: A008350 A008351 A008352 this_sequence A008354 A008355 A008356`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com) and J. H. Conway (conway(AT)math.princeton.edu)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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