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 A113687 Expansion of q^(-7/12)eta(q)eta(q^6)^3/(eta(q^2)eta(q^3)) in powers of q. 1
 1, -1, 0, 0, 0, -1, -1, 1, 1, 0, 0, 1, -1, 1, -1, 0, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, 1, -1, 0, 1, -1, 0, 0, 0, -1, 0, 0, 1, 1, 1, 0, 1, -1, 0, 1, 0, -1, 0, 0, 1, -1, -1, 0, 0, 0, 1, 0, 1, 0, 0, 0, -1, -2, 0, -1, 0, 0, -1, 0, 1, 1, -1, 1, 0, -1, 0, 2, 0, 0, -1, 0, 1, 0, 0, -1, 1, 0, -1, 0, -1, 2, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, -1, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,64 COMMENTS |a(n)|<2 if n<63, |a(n)|<3 if n<742, |a(n)|<4 if n<8456. LINKS FORMULA Euler transform of period 6 sequence [ -1, 0, 0, 0, -1, -2, ...]. G.f.: Product_{k>0} (1-x^(6k))^2*(1-x^(6k-1))*(1-x^(6k-5)). PROG (PARI) {a(n)=local(A); if(n<0, 0, A=x*O(x^n); polcoeff( eta(x+A)*eta(x^6+A)^3/ eta(x^2+A)/eta(x^3+A), n))} CROSSREFS Sequence in context: A281274 A191250 A107064 * A071006 A227740 A284503 Adjacent sequences:  A113684 A113685 A113686 * A113688 A113689 A113690 KEYWORD sign AUTHOR Michael Somos, Nov 05 2005 STATUS approved

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Last modified January 15 20:47 EST 2019. Contains 319184 sequences. (Running on oeis4.)