id:A104624 - OEIS Search Results

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Reversion of binomial(2n,n) (A000984).

+0
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1, -2, 2, 0, -2, 0, 4, 0, -10, 0, 28, 0, -84, 0, 264, 0, -858, 0, 2860, 0, -9724, 0, 33592, 0, -117572, 0, 416024, 0, -1485800, 0, 5348880, 0, -19389690, 0, 70715340, 0, -259289580, 0, 955277400, 0, -3534526380, 0, 13128240840, 0, -48932534040, 0, 182965127280, 0, -686119227300, 0 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`First column in inverse of A054335.`
	FORMULA	`G.f.: sqrt(1+4x^2)-2x` `The positive sequence 1,2,2,0,2,.... has g.f. 2(1+x)-sqrt(1-4x^2). - Paul Barry (pbarry(AT)wit.ie), Oct 10 2007`
	CROSSREFS	`Sequence in context: A122157 A080378 A120439 this_sequence A049850 A050949 A074943` `Adjacent sequences: A104621 A104622 A104623 this_sequence A104625 A104626 A104627`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 17 2005`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research