A117264 - OEIS

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A117264

Self-convolution square-root of A117263.

1, 1, 3, 29, 831, 69107, 16944055, 12387543565, 27116679815367, 177967005474840987, 3503280999913078429261, 206872249547698485286567247, 36647212198301159763279385189667 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	PROG	`(PARI) {a(n)=local(A2=vector(n+1, m, sum(k=0, m-1, 3^((m-k-1)*(m+k-2)/2)))); Vec(Ser(A2)^(1/2))[n+1]}`
	CROSSREFS	`Sequence in context: A186451 A092251 A064570 * A065072 A088389 A094000` `Adjacent sequences: A117261 A117262 A117263 * A117265 A117266 A117267`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Mar 14 2006`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.