id:A122100 - OEIS Search Results

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a(0)=1, a(1)=-1, a(2)=0, a(n)=3*a(n-1)-a(n-3) for n>2.

+0
4

1, -1, 0, -1, -2, -6, -17, -49, -141, -406, -1169, -3366, -9692, -27907, -80355, -231373, -666212, -1918281, -5523470, -15904198, -45794313, -131859469, -379674209, -1093228314, -3147825473, -9063802210, -26098178316, -75146709475, -216376326215, -623030800329, -1793945691512 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`G.f.:(1-4x+3x^2)/(1-3*x+x^3)`
	CROSSREFS	`Sequence in context: A077983 A036365 A052536 this_sequence A122099 A026165 A148445` `Adjacent sequences: A122097 A122098 A122099 this_sequence A122101 A122102 A122103`
	KEYWORD	`sign`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 18 2006`

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

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