a(n) = sum of base-9 digits of a(n-1) + sum of base-9 digits of a(n-2).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =8a(7) =13a(8) =13a(9) =10a(10) =7a(11) =9a(12) =8a(13) =9a(14) =9a(15) =2a(16) =3a(17) =5a(18) =8a(19) =13a(20) =13a(21) =10a(22) =7a(23) =9a(24) =8a(25) =9a(26) =9a(27) =2a(28) =3a(29) =5