id:A119332 - OEIS Search Results

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A119332

Expansion of (1+x)/(1-2x^4).

+0
3

1, 1, 0, 0, 2, 2, 0, 0, 4, 4, 0, 0, 8, 8, 0, 0, 16, 16, 0, 0, 32, 32, 0, 0, 64, 64, 0, 0, 128, 128, 0, 0, 256, 256, 0, 0, 512, 512, 0, 0, 1024, 1024, 0, 0, 2048, 2048, 0, 0, 4096, 4096, 0, 0, 8192, 8192, 0, 0, 16384, 16384, 0, 0, 32768 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Row sums of A119331. Binomial transform is A119330.`
	FORMULA	`a(n)=sum{k=0..n, sum{i=0..n, (-1)^(n-i)C(n,i)sum{j=0..i-k, C(k,2j)C(i-k,2j)2^j}}}.`
	CROSSREFS	`Sequence in context: A062275 A138270 A134315 this_sequence A089262 A069971 A063865` `Adjacent sequences: A119329 A119330 A119331 this_sequence A119333 A119334 A119335`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 14 2006`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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