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

Terms

a(0) =1a(1) =1a(2) =-3a(3) =6a(4) =-4a(5) =-15a(6) =54a(7) =-87a(8) =63a(9) =79a(10) =-405a(11) =912a(12) =-1363a(13) =1193a(14) =510a(15) =-4900a(16) =12512a(17) =-21582a(18) =26512a(19) =-16540a(20) =-24585a(21) =113682a(22) =-255045a(23) =419931a(24) =-519210a(25) =377176a(26) =267957a(27) =-1703694a(28) =4090424a(29) =-7179222