id:A104507 - OEIS Search Results

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Row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x^2)^n.

+0
3

1, 0, -2, -3, 2, 15, 19, -28, -134, -129, 353, 1254, 791, -4238, -11818, -3123, 49162, 110007, -17783, -554458, -996323, 690932, 6096792, 8624747, -12287153, -65419110, -69285296, 178655307, 684550946, 483569751, -2354830741, -6970706252, -2324044054, 29195280375, 68793790705 (list; graph; listen)

	OFFSET	`0,3`
	PROGRAM	`(PARI) a(n)=sum(k=0, n, polcoeff((1+x-x^2)^n, n+k))`
	CROSSREFS	`Cf. A104505.` `Sequence in context: A023641 A083775 A083784 this_sequence A101033 A136454 A025522` `Adjacent sequences: A104504 A104505 A104506 this_sequence A104508 A104509 A104510`
	KEYWORD	`sign`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Mar 11 2005`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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