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

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =7a(6) =11a(7) =17a(8) =26a(9) =40a(10) =60a(11) =88a(12) =131a(13) =190a(14) =276a(15) =398a(16) =568a(17) =806a(18) =1142a(19) =1603a(20) =2242a(21) =3124a(22) =4328a(23) =5973a(24) =8214a(25) =11249a(26) =15349a(27) =20879a(28) =28297a(29) =38235