A022997 - OEIS

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A022997

Numerator of n*(n-2)*(2*n-1)/(2*(n-1)).

0, 15, 28, 135, 132, 455, 360, 1071, 760, 2079, 1380, 3575, 2268, 5655, 3472, 8415, 5040, 11951, 7020, 16359, 9460, 21735, 12408, 28175, 15912, 35775, 20020, 44631, 24780, 54839, 30240, 66495, 36448 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,2`
	FORMULA	`G.f. x^3(x^6+5x^4+20x^3+75x^2+28x+15)/(x-1)^4/(x+1)^4. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 03 2003`
	CROSSREFS	`Sequence in context: A043888 A121594 A163286 * A051121 A001356 A104811` `Adjacent sequences: A022994 A022995 A022996 * A022998 A022999 A023000`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.