Expansion of Product_{n>=1} (1 - x^(5*n))/(1 - x^n)^4 in powers of x.

Terms

a(0) =1a(1) =4a(2) =14a(3) =40a(4) =105a(5) =251a(6) =570a(7) =1226a(8) =2540a(9) =5075a(10) =9855a(11) =18630a(12) =34439a(13) =62340a(14) =110805a(15) =193624a(16) =333235a(17) =565415a(18) =947040a(19) =1567130a(20) =2564425a(21) =4152535a(22) =6658711a(23) =10579380a(24) =16663755a(25) =26033200a(26) =40357641a(27) =62106290a(28) =94912385a(29) =144088840