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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =7a(5) =10a(6) =13a(7) =16a(8) =22a(9) =30a(10) =38a(11) =46a(12) =58a(13) =74a(14) =90a(15) =106a(16) =129a(17) =158a(18) =190a(19) =222a(20) =264a(21) =314a(22) =370a(23) =426a(24) =495a(25) =580a(26) =674a(27) =772a(28) =886a(29) =1024