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A094428 Expansion of infinite product (q^12,q^12,q^6;q^5,q^7;q^12)_infty. 0
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; refs; listen; history; text; internal format)
OFFSET

0,36

COMMENTS

|a(n)|<3 if n<1299, a(1299)=3.

LINKS

Table of n, a(n) for n=0..104.

FORMULA

G.f.: Product_{k>0} (1-x^(12k))^2(1-x^(12k-6))/((1-x^(12k-5))(1-x^(12k-7))).

PROG

(PARI) a(n)=local(A); if(n<0, 0, A=1+x*O(x^n); polcoeff(prod(n=1, n\12+1, if(m=12*n, (A-x^m)^2*(A-x^(m-6))/(A-x^(m-5))/(A-x^(m-7)))), n))

CROSSREFS

Sequence in context: A083916 A083893 A187097 * A277148 A194024 A082786

Adjacent sequences:  A094425 A094426 A094427 * A094429 A094430 A094431

KEYWORD

sign

AUTHOR

Michael Somos, May 10 2004

STATUS

approved

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Last modified December 12 20:12 EST 2019. Contains 329961 sequences. (Running on oeis4.)