Expansion of (phi(-q^3)^2 / (phi(-q) * phi(-q^9)))^2 in powers of q where phi() is a Ramanujan theta function.

A227587

Expansion of (phi(-q^3)^2 / (phi(-q) * phi(-q^9)))^2 in powers of q where phi() is a Ramanujan theta function.

Terms

    a(0) =1a(1) =4a(2) =12a(3) =24a(4) =44a(5) =72a(6) =120a(7) =192a(8) =300a(9) =456a(10) =680a(11) =1008a(12) =1464a(13) =2104a(14) =2976a(15) =4176a(16) =5804a(17) =7992a(18) =10920a(19) =14800a(20) =19944a(21) =26688a(22) =35504a(23) =46944a(24) =61752a(25) =80828a(26) =105288a(27) =136536a(28) =176288a(29) =226728

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