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

Terms

a(0) =1a(1) =1a(2) =0a(3) =3a(4) =3a(5) =0a(6) =9a(7) =9a(8) =0a(9) =19a(10) =29a(11) =10a(12) =33a(13) =63a(14) =30a(15) =66a(16) =156a(17) =90a(18) =110a(19) =300a(20) =235a(21) =276a(22) =561a(23) =465a(24) =558a(25) =1083a(26) =1065a(27) =1154a(28) =1877a(29) =1983