Number of subwords of length n in infinite word generated by a -> aab, b -> b.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =9a(5) =13a(6) =17a(7) =22a(8) =28a(9) =35a(10) =43a(11) =51a(12) =60a(13) =70a(14) =81a(15) =93a(16) =106a(17) =120a(18) =135a(19) =151a(20) =167a(21) =184a(22) =202a(23) =221a(24) =241a(25) =262a(26) =284a(27) =307a(28) =331a(29) =356