A080420 - OEIS

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A080420

(n+1)(n+6)3^n/6.

1, 7, 36, 162, 675, 2673, 10206, 37908, 137781, 492075, 1732104, 6022998, 20726199, 70681653, 239148450, 803538792, 2683245609, 8910671247, 29443957164, 96855122250, 317297380491, 1035574967097, 3368233731366, 10920608743932 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1-2x)/(1-3x)^3`
	CROSSREFS	`T(n, 2) in triangle A080419` `Sequence in context: A184246 A097554 A055221 * A181292 A026018 A085354` `Adjacent sequences: A080417 A080418 A080419 * A080421 A080422 A080423`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 19 2003`

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Last modified February 15 19:15 EST 2012. Contains 205852 sequences.