id:A099213 - OEIS Search Results

Search: id:A099213

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a(n)=a(n-1)+a(n-2)+3a(n-3).

+0
4

1, 1, 1, 5, 9, 17, 41, 85, 177, 385, 817, 1733, 3705, 7889, 16793, 35797, 76257, 162433, 346081, 737285, 1570665, 3346193, 7128713, 15186901, 32354193, 68927233, 146842129, 312831941, 666455769, 1419814097, 3024765689, 6443947093 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Binomial transform is A099214. Binomial transform of A099212.`
	FORMULA	`G.f.: (1-x^2)/(1-x-x^2-3x^2)`
	CROSSREFS	`Adjacent sequences: A099210 A099211 A099212 this_sequence A099214 A099215 A099216` `Sequence in context: A000322 A020737 A062536 this_sequence A061502 A110349 A036832`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 06 2004`

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Last modified May 13 01:46 EDT 2008. Contains 139661 sequences.

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