id:A094428 - OEIS Search Results

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Expansion of infinite product (q^12,q^12,q^6;q^5,q^7;q^12)_infty.

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1

1, 0, 0, 0, 0, 1, -1, 1, 0, 0, 1, -1, -1, -1, 1, 1, -1, 0, 0, 0, 0, 0, 0, -1, 1, 0, -1, -1, 0, 0, 1, -1, -1, -1, 0, 2, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1, -2, 0, -1, 2, 0, -1, 1, -1, -1, 0, 1, 0, 0, 1, 0, -1, 0, 0, 1, 1, 0, 0, 0, 0, 1, -1, -1, 0, -1, 1, 0, 0, 1, -1, 1, 0, -1, 0, 1, 1, 0, 1, -1, -1, 1, 0, 1, 0, 1, 0, -1, -1, 1, 0, 1, 0, 1, 0, -1 (list; graph; listen)

	OFFSET	`0,36`
	COMMENT	`\|a(n)\|<3 if n<1299, a(1299)=3.`
	FORMULA	`G.f.: Product_{k>0} (1-x^(12k))^2(1-x^(12k-6))/((1-x^(12k-5))(1-x^(12k-7))).`
	PROGRAM	`(PARI) a(n)=local(A); if(n<0, 0, A=1+xO(x^n); polcoeff(prod(n=1, n\12+1, if(m=12n, (A-x^m)^2*(A-x^(m-6))/(A-x^(m-5))/(A-x^(m-7)))), n))`
	CROSSREFS	`Sequence in context: A010105 A083916 A083893 this_sequence A082786 A101638 A070141` `Adjacent sequences: A094425 A094426 A094427 this_sequence A094429 A094430 A094431`
	KEYWORD	`sign`
	AUTHOR	`Michael Somos, May 10 2004`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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