id:A135867 - OEIS Search Results

Search: id:A135867

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G.f. A(x) = 1 + x*A(2x)^2.

+0
3

1, 1, 4, 36, 640, 21888, 1451008, 188941312, 48768745472, 25069815595008, 25722272102744064, 52730972085034156032, 216091838647321476726784, 1770657164881170759078117376, 29013990909330956353981535748096 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Self-convolution equals A135868.`
	PROGRAM	`(PARI) {a(n)=local(A=1+x+xO(x^n)); for(i=0, n, A=1+xsubst(A, x, 2*x)^2); polcoeff(A, n)}`
	CROSSREFS	`Cf. A135868.` `Sequence in context: A086879 A002761 A002084 this_sequence A029989 A126152 A009446` `Adjacent sequences: A135864 A135865 A135866 this_sequence A135868 A135869 A135870`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 02 2007`

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

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