Expansion of (phi(-x^2) * phi(-x^4)^2 / phi(-x)^3)^2 in powers of x where phi() is a Ramanujan theta function.

A258591

Expansion of (phi(-x^2) * phi(-x^4)^2 / phi(-x)^3)^2 in powers of x where phi() is a Ramanujan theta function.

Terms

    a(0) =1a(1) =12a(2) =80a(3) =400a(4) =1664a(5) =6056a(6) =19904a(7) =60320a(8) =171008a(9) =458428a(10) =1171552a(11) =2872368a(12) =6790656a(13) =15544136a(14) =34568576a(15) =74901984a(16) =158507008a(17) =328277848a(18) =666568592a(19) =1329014992a(20) =2605464320a(21) =5028397952a(22) =9563654976a(23) =17942323424a(24) =33232441344a(25) =60814373780a(26) =110029864416

External references