A085359 - OEIS

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A085359

Third self-convolution of A085357 (residues of binomial(3k,k)/(2k+1) modulo 2).

1, 3, 6, 7, 9, 12, 16, 15, 15, 21, 30, 30, 28, 30, 36, 31, 27, 33, 48, 51, 51, 54, 66, 60, 52, 60, 78, 76, 66, 66, 76, 63, 51, 57, 78, 81, 81, 90, 114, 105, 93, 111, 144, 138, 120, 126, 150, 126, 100, 108, 144, 148, 138, 138, 166, 150, 126, 138, 174, 168, 142, 138, 156 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`a(n) - A085357(n-1) is always even for n>0.`
	FORMULA	`G.f.: 1 + xA(x) = A085357(x)^3 (Mod 2), where A085357(x)=sum(k>=0, A085357(k)x^k).`
	CROSSREFS	`Cf. A001764 (ternary trees), A085357.` `Sequence in context: A026227 A026232 A061641 * A087916 A023982 A189092` `Adjacent sequences: A085356 A085357 A085358 * A085360 A085361 A085362`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 25 2003`

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Last modified February 17 07:41 EST 2012. Contains 205998 sequences.