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

Terms

a(0) =1a(1) =2a(2) =5a(3) =14a(4) =30a(5) =68a(6) =145a(7) =298a(8) =600a(9) =1182a(10) =2280a(11) =4318a(12) =8064a(13) =14824a(14) =26917a(15) =48292a(16) =85675a(17) =150466a(18) =261762a(19) =451328a(20) =771739a(21) =1309362a(22) =2205109a(23) =3687904a(24) =6127155a(25) =10116074a(26) =16602508a(27) =27093582a(28) =43974355a(29) =71003224