Expansion of Product_{k>0} (1-k^2*x^k)^(-1/k).

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =16a(5) =27a(6) =79a(7) =126a(8) =331a(9) =632a(10) =1436a(11) =2509a(12) =6800a(13) =11218a(14) =26044a(15) =51958a(16) =114941a(17) =205183a(18) =502228a(19) =875545a(20) =2027193a(21) =3963938a(22) =8389190a(23) =15504996a(24) =37555290a(25) =66502859a(26) =145809046a(27) =292860564a(28) =621638120a(29) =1156065731