Partial sums of A006950.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =12a(6) =17a(7) =24a(8) =34a(9) =47a(10) =63a(11) =84a(12) =112a(13) =147a(14) =190a(15) =245a(16) =315a(17) =401a(18) =506a(19) =636a(20) =797a(21) =993a(22) =1229a(23) =1516a(24) =1866a(25) =2286a(26) =2787a(27) =3389a(28) =4111a(29) =4969