id:A110556 - OEIS Search Results

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Binomial(2*n-1,n)*(-1)^n for n>0; a(0) = 1.

+0
5

1, -1, 3, -10, 35, -126, 462, -1716, 6435, -24310, 92378, -352716, 1352078, -5200300, 20058300, -77558760, 300540195, -1166803110, 4537567650, -17672631900, 68923264410, -269128937220, 1052049481860, -4116715363800, 16123801841550 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n) = A110555(2n,n), central terms in triangle A110555;` `a(n) = A088218(n)(-1)^n.`
	CROSSREFS	`Another version of A001700, which is the main entry. Cf. A000984, A007318.` `Sequence in context: A167403 A001700 A088218 this_sequence A072266 A085282 A149036` `Adjacent sequences: A110553 A110554 A110555 this_sequence A110557 A110558 A110559`
	KEYWORD	`sign`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 27 2005`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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