An INVERT sequence for A010054.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =10a(6) =18a(7) =32a(8) =57a(9) =101a(10) =179a(11) =319a(12) =566a(13) =1006a(14) =1786a(15) =3174a(16) =5638a(17) =10016a(18) =17793a(19) =31609a(20) =56153a(21) =99753a(22) =177211a(23) =314810a(24) =559255a(25) =993501a(26) =1764935a(27) =3135366a(28) =5569909a(29) =9894819