id:A136592 - OEIS Search Results

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Column 2 of triangle A136590.

+0
5

1, 3, -13, -10, 394, -2016, -5076, 170064, -1155024, -5005440, 193724640, -1656720000, -10280355840, 465087087360, -4804977542400, -39012996556800, 2035558551398400, -24660231399014400, -248246498826547200, 14713557956794368000 (list; graph; listen)

	OFFSET	`2,2`
	FORMULA	`E.g.f.: A(x) = log(1 + x + x^2)^2 / 2!.`
	EXAMPLE	`E.g.f.: A(x) = 1x^2/2! + 3x^3/3! - 13x^4/4! - 10x^5/5! + 394*x^6/6! +...`
	PROGRAM	`(PARI) a(n)=(n+2)!polcoeff(log(1+x+x^2 +xO(x^(n+2)))^2/2!, n+2)`
	CROSSREFS	`Cf. A136590, A136591, A136593, A136594.` `Adjacent sequences: A136589 A136590 A136591 this_sequence A136593 A136594 A136595` `Sequence in context: A127438 A046421 A071708 this_sequence A085416 A107802 A066674`
	KEYWORD	`sign`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jan 10 2008`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

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