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

Terms

a(0) =1a(1) =1a(2) =5a(3) =9a(4) =28a(5) =48a(6) =130a(7) =226a(8) =532a(9) =941a(10) =2021a(11) =3545a(12) =7210a(13) =12509a(14) =24209a(15) =41715a(16) =77742a(17) =132404a(18) =239655a(19) =403731a(20) =712426a(21) =1188079a(22) =2052070a(23) =3386854a(24) =5745200a(25) =9388740a(26) =15672560a(27) =25376167a(28) =41765597a(29) =67021171