id:A133672 - OEIS Search Results

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a(n)=a(n-1)-81*a(n-2), a(0)=1, a(1)=9 .

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1, 9, -72, -801, 5031, 69912, -337599, -6000471, 21345048, 507383199, -1221565689, -42319604808, 56627216001, 3484515205449, -1102289290632, -283348020932001, -194062588390809, 22757127107101272, 38476196766756801, -1804851098908446231 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.:(1+8x)/(1-x+81x^2).` `a(n)=Sum_{k, 0<=k<=n}A133607(n,k)*9^k. - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Dec 30 2007`
	CROSSREFS	`Sequence in context: A127053 A001809 A006135 this_sequence A043079 A099973 A091986` `Adjacent sequences: A133669 A133670 A133671 this_sequence A133673 A133674 A133675`
	KEYWORD	`easy,sign`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Dec 29 2007`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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