id:A098579 - OEIS Search Results

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Expansion of sqrt(1-8x).

+0
2

1, -4, -8, -32, -160, -896, -5376, -33792, -219648, -1464320, -9957376, -68796416, -481574912, -3408068608, -24343347200, -175272099840, -1270722723840, -9268801044480, -67971207659520, -500840477491200, -3706219533434880 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: 4xC(2x)-1, where C(x) is the g.f. for the Catalan numbers A000108; a(0)=1, a(n)=-2^(n+1)*binomial(2(n-1), n-1)/n, n>0.`
	CROSSREFS	`Cf. A052701, A002420.` `Sequence in context: A034785 A075398 A072868 this_sequence A032467 A009265 A149095` `Adjacent sequences: A098576 A098577 A098578 this_sequence A098580 A098581 A098582`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 16 2004`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research