id:A080856 - OEIS Search Results

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Generalized polygonal numbers.

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1, 5, 25, 61, 113, 181, 265, 365, 481, 613, 761, 925, 1105, 1301, 1513, 1741, 1985, 2245, 2521, 2813, 3121, 3445, 3785, 4141, 4513, 4901, 5305, 5725, 6161, 6613, 7081, 7565, 8065, 8581, 9113, 9661, 10225, 10805, 11401, 12013, 12641, 13285, 13945 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row T(4,n) of A080853`
	FORMULA	`a(n)=8n^2-4n+1 = (16n^2-8n+2)/2 G.f.: (1+2x+13x^2)/(1-x)^3` `a(n)=A060820(n), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 18 2008]`
	CROSSREFS	`Adjacent sequences: A080853 A080854 A080855 this_sequence A080857 A080858 A080859` `Sequence in context: A078569 A044082 A045576 this_sequence A060820 A054994 A108403`
	KEYWORD	`easy,nonn,new`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 23 2003`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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