Bosonic string states.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =2a(7) =2a(8) =4a(9) =4a(10) =7a(11) =8a(12) =14a(13) =16a(14) =25a(15) =31a(16) =47a(17) =58a(18) =85a(19) =107a(20) =153a(21) =195a(22) =271a(23) =348a(24) =480a(25) =616a(26) =834a(27) =1077a(28) =1445a(29) =1863