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

Terms

a(0) =1a(1) =1a(2) =0a(3) =3a(4) =3a(5) =0a(6) =6a(7) =6a(8) =0a(9) =18a(10) =28a(11) =10a(12) =0a(13) =30a(14) =30a(15) =15a(16) =75a(17) =60a(18) =45a(19) =225a(20) =180a(21) =111a(22) =111a(23) =0a(24) =333a(25) =483a(26) =150a(27) =126a(28) =604a(29) =478