id:A117573 - OEIS Search Results

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

+0
2

1, 1, 4, 5, 8, 11, 15, 18, 24, 28, 34, 40, 47, 53, 62, 69, 78, 87, 97, 106, 118, 128, 140, 152, 165, 177, 192, 205, 220, 235, 251, 266, 284, 300, 318, 336, 355, 373, 394, 413, 434, 455, 477, 498, 522, 544, 568, 592, 617, 641, 668 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Partial sums of A117572.`
	FORMULA	`a(n)=a(n-1)+a(n-2)-a(n-4)-a(n-5)+a(n-6); a(n)=sqrt(3)cos(2pin/3+pi/6)/9-sin(2pin/3+pi/6)/3+3cos(pi*n)/8+(6n^2+20n+15)/24;`
	CROSSREFS	`Sequence in context: A057479 A050140 A047376 this_sequence A144062 A066233 A130814` `Adjacent sequences: A117570 A117571 A117572 this_sequence A117574 A117575 A117576`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 29 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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