id:A106269 - OEIS Search Results

Search: id:A106269

Displaying 1-1 of 1 results found.

page 1

Expansion of 1/((1-x^2)(2-c(x))), c(x) the g.f. of A000108.

+0
2

1, 1, 4, 11, 39, 137, 501, 1853, 6936, 26163, 99314, 378879, 1451392, 5579179, 21509692, 83137939, 322049887, 1249941049, 4859617537, 18922572949, 73782881947, 288051510169, 1125832363807, 4404766873969, 17249634205357 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Row sums of number triangle A106268.`
	FORMULA	`a(n)=(-1)^n*sum{k=0..floor(n/2), binomial(2k-n, n-2k)}.`
	CROSSREFS	`Adjacent sequences: A106266 A106267 A106268 this_sequence A106270 A106271 A106272` `Sequence in context: A027573 A050987 A137191 this_sequence A126758 A050911 A077236`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 28 2005`

page 1

Search completed in 0.002 seconds

Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

AT&T Labs Research