Mix A091411 and its differences.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =10a(6) =19a(7) =28a(8) =47a(9) =51a(10) =98a(11) =122a(12) =220a(13) =221a(14) =441a(15) =444a(16) =885a(17) =886a(18) =1771a(19) =1780a(20) =3551a(21) =3555a(22) =7106a(23) =7173a(24) =14279a(25) =14280a(26) =28559a(27) =28562a(28) =57121a(29) =57122