A136591 - OEIS

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A136591

Column 1 of triangle A136590.

1, 1, -4, 6, 24, -240, 720, 5040, -80640, 362880, 3628800, -79833600, 479001600, 6227020800, -174356582400, 1307674368000, 20922789888000, -711374856192000, 6402373705728000, 121645100408832000, -4865804016353280000, 51090942171709440000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	FORMULA	`E.g.f.: A(x) = log(1 + x + x^2). a(n) = n!*A061347(n) for n>=1.`
	PROG	`(PARI) a(n)=(n+1)!polcoeff(log(1+x+x^2 +xO(x^(n+1))), n+1)`
	CROSSREFS	`Cf. A136590, A136592, A136593, A136594; A061347.` `Sequence in context: A000287 A032087 A165164 * A009459 A123055 A176858` `Adjacent sequences: A136588 A136589 A136590 * A136592 A136593 A136594`
	KEYWORD	`sign`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jan 10 2008`

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.