id:A097321 - OEIS Search Results

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(3n-1) * 3n * (3n+1).

+0
4

24, 210, 720, 1716, 3360, 5814, 9240, 13800, 19656, 26970, 35904, 46620, 59280, 74046, 91080, 110544, 132600, 157410, 185136, 215940, 249984, 287430, 328440, 373176, 421800, 474474, 531360, 592620, 658416, 728910, 804264, 884640 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`log(3) = lim [n->infinity, 1/a(n)].`
	LINKS	`S. Ramanujan, Notebook entry`
	FORMULA	`G.f.: 6x * (4x^2 + 19x + 4) / (1-x)^4.`
	CROSSREFS	`Cf. A069072, A069140, A002391, A016767.` `Sequence in context: A055857 A047659 A108671 this_sequence A105946 A050222 A008655` `Adjacent sequences: A097318 A097319 A097320 this_sequence A097322 A097323 A097324`
	KEYWORD	`nonn,easy`
	AUTHOR	`Ralf Stephan, Aug 07 2004`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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