Triangle of numbers relating two simple context-free grammars (A052709 and A052705).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =7a(6) =9a(7) =12a(8) =15a(9) =24a(10) =31a(11) =40a(12) =49a(13) =58a(14) =89a(15) =113a(16) =144a(17) =171a(18) =198a(19) =229a(20) =342a(21) =431a(22) =544a(23) =637a(24) =718a(25) =811a(26) =924a(27) =1355a(28) =1697a(29) =2128