id:A051958 - OEIS Search Results

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A051958

a(n) = 2 a(n-1) + 24 a(n-2), a(0)=0, a(1)=1.

+0
6

0, 1, 2, 28, 104, 880, 4256, 29632, 161408, 1033984, 5941760, 36699136, 216000512, 1312780288, 7809572864, 47125872640, 281681494016, 1694383931392, 10149123719168, 60963461791744, 365505892843520, 2194134868688896 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`G.f.: x/((1+4x)(1-6*x)). a(n)=(6^n-(-4)^n)/10`
	PROGRAM	`(PARI) a(n)=(6^n-(-4)^n)/10`
	CROSSREFS	`a(n)=2^(n-1)*A015441(n).` `Cf. A015441.` `Sequence in context: A022376 A156471 A138964 this_sequence A123807 A164834 A110241` `Adjacent sequences: A051955 A051956 A051957 this_sequence A051959 A051960 A051961`
	KEYWORD	`easy,nonn`
	AUTHOR	`Barry E. Williams, Jan 04 2000`
	EXTENSIONS	`More terms from Michael Somos, Apr 28, 2000.`

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

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