A022325 - OEIS

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A022325

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

1, 11, 13, 25, 39, 65, 105, 171, 277, 449, 727, 1177, 1905, 3083, 4989, 8073, 13063, 21137, 34201, 55339, 89541, 144881, 234423, 379305, 613729, 993035, 1606765, 2599801, 4206567, 6806369, 11012937 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (2,0,-1)`
	FORMULA	`G.f. ( 1+9x-9x^2 ) / ( (x-1)*(x^2+x-1) ). a(n)=A022368(n)-1. - R. J. Mathar, Apr 07 2011`
	CROSSREFS	`Sequence in context: A127043 A084952 A090433 * A153055 A146915 A132245` `Adjacent sequences: A022322 A022323 A022324 * A022326 A022327 A022328`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.