id:A152256 - OEIS Search Results

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Powers of 3 sequence:a(n)=(3^n - 1)*(3^n + 1)*(3^n + 1)/32.

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0, 1, 25, 637, 16810, 450241, 12123475, 327035437, 8827268020, 238312027681, 6434206838125, 173721623357437, 4690466178937630, 126642427965100321, 3419344125259375975, 92322278513810982637, 2492701404059145489640 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=(3^n - 1)(3^n + 1)(3^n + 1)/32.`
	MATHEMATICA	`Clear[a, n];` `a[n_] := (3^n - 1)(3^n + 1)(3^n + 1)/32` `Table[a[n], {n, 0, 30}]`
	CROSSREFS	`Sequence in context: A068180 A009969 A042202 this_sequence A153111 A097194 A015697` `Adjacent sequences: A152253 A152254 A152255 this_sequence A152257 A152258 A152259`
	KEYWORD	`nonn`
	AUTHOR	`Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Dec 01 2008`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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