A051263 - OEIS

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A051263

Expansion of 1/((1-x)*(1-x^3)^2*(1-x^5)).

1, 1, 1, 3, 3, 4, 7, 7, 9, 13, 14, 17, 22, 24, 28, 35, 38, 43, 52, 56, 63, 74, 79, 88, 101, 108, 119, 134, 143, 156, 174, 185, 200, 221, 234, 252, 276, 291, 312, 339, 357, 381, 411, 432, 459, 493, 517, 547, 585, 612, 646, 688, 718, 756, 802, 836, 878, 928, 966 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`A two-way infinite sequences which is palindromic (up to sign). - Michael Somos, Mar 21, 2003`
	LINKS	`Index entries for two-way infinite sequences`
	FORMULA	`G.f.: 1/((1-x)(1-x^3)^2(1-x^5)). a(-12-n)=-a(n). a(n)=a(n-1)+2a(n-3)-2a(n-4)+a(n-5)-2a(n-6)+a(n-7)-2a(n-8)+2a(n-9)+a(n-11)-a(n-12).`
	PROG	`(PARI) a(n)=if(n<-11, -a(-12-n), if(n<0, 0, polcoeff(1/((1-x)(1-x^3)^2(1-x^5))+x*O(x^n), n)))`
	CROSSREFS	`Cf. A028288.` `Cf. A028288. A029153(n)=a(n\2-n%2)=a(A028242(n-2)).` `Sequence in context: A076619 A007448 A155689 * A058674 A152651 A091973` `Adjacent sequences: A051260 A051261 A051262 * A051264 A051265 A051266`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 08:21 EST 2012. Contains 205998 sequences.