A028350 - OEIS

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A028350

See program line.

-1, 6, 210, 12012, 831402, 63740820, 5209363380, 444799488600, 39209074920090, 3541117629057540, 325969196485349340, 30471769822097981160, 2884881686418189303300, 276043232874562618320072 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MAPLE	`a := proc(n) option remember; if n = -1 then -1 else 6(6n - 1)(6n + 1)a(n - 1)/((n + 1)(2*n + 1)) fi; end;`
	CROSSREFS	`Sequence in context: A183252 A183287 A087639 * A099788 A126676 A073100` `Adjacent sequences: A028347 A028348 A028349 * A028351 A028352 A028353`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 18:22 EST 2012. Contains 205835 sequences.