id:A135440 - OEIS Search Results

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a(n)=a(n-1)+2a(n-2).

+0
2

-1, 4, 2, 10, 14, 34, 62, 130, 254, 514, 1022, 2050, 4094, 8194, 16382, 32770, 65534, 131074, 262142, 524290, 1048574, 2097154, 4194302, 8388610, 16777214, 33554434, 67108862, 134217730, 268435454, 536870914, 1073741822, 2147483650, 4294967294, 8589934594, 17179869182, 34359738370 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`O.g.f.: -1/(2x-1)-2/(1+x). a(n) = 2^n-2(-1)^n. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 19 2008`
	CROSSREFS	`Sequence in context: A121794 A075086 A128781 this_sequence A091484 A163544 A163918` `Adjacent sequences: A135437 A135438 A135439 this_sequence A135441 A135442 A135443`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Feb 18 2008`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 19 2008`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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