id:A076148 - OEIS Search Results

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Let b(1)=x, b(2)=y, k*b(k)=(2k-1)*b(k-1) + 3(k+1)*b(k-2); then b(n)=a(n)*x+c(n)/3*y.

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1, 0, 4, 7, 27, 74, 230, 681, 2053, 6148, 18456, 55355, 166079, 498222, 1494682, 4484029, 13452105, 40356296, 121068908, 363206703, 1089620131, 3268860370, 9806581134, 29419743377, 88259230157, 264777690444, 794333071360 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(1)=1; a(n+1) = 3a(n)+(-1)^n(n+2); a(n)=floor((5/16)3^(n-1)-(-1)^nn/4+1/2)`
	CROSSREFS	`Sequence in context: A110413 A075686 A077441 this_sequence A146085 A061668 A128386` `Adjacent sequences: A076145 A076146 A076147 this_sequence A076149 A076150 A076151`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 02 2002`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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