Expansion of Product_{m>=1} (1+q^m)^(m^2).

Terms

a(0) =1a(1) =1a(2) =4a(3) =13a(4) =31a(5) =83a(6) =201a(7) =487a(8) =1141a(9) =2641a(10) =5972a(11) =13309a(12) =29248a(13) =63360a(14) =135688a(15) =287197a(16) =601629a(17) =1247909a(18) =2565037a(19) =5226816a(20) =10565132a(21) =21192569a(22) =42202909a(23) =83466925a(24) =163999684a(25) =320230999a(26) =621579965a(27) =1199659836a(28) =2302765961a(29) =4397132933