Expansion of Product_{k>=1} (1 + x^k)^(sigma_0(k)^2).

Terms

a(0) =1a(1) =1a(2) =4a(3) =8a(4) =19a(5) =35a(6) =82a(7) =142a(8) =291a(9) =524a(10) =989a(11) =1724a(12) =3174a(13) =5393a(14) =9517a(15) =16064a(16) =27464a(17) =45481a(18) =76357a(19) =124402a(20) =204497a(21) =329559a(22) =532316a(23) =846564a(24) =1349481a(25) =2120814a(26) =3335819a(27) =5191522a(28) =8070062a(29) =12434176