Expansion of (eta(q^7) / eta(q))^4 in powers of q.

Terms

a(0) =1a(1) =4a(2) =14a(3) =40a(4) =105a(5) =252a(6) =574a(7) =1236a(8) =2564a(9) =5124a(10) =9948a(11) =18788a(12) =34685a(13) =62664a(14) =111132a(15) =193672a(16) =332325a(17) =561996a(18) =937958a(19) =1546132a(20) =2519825a(21) =4062888a(22) =6486008a(23) =10257324a(24) =16079389a(25) =24996636a(26) =38555216a(27) =59025820a(28) =89728900a(29) =135486960