a(n) = 2^n - A006951(n).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =2a(5) =5a(6) =4a(7) =11a(8) =10a(9) =22a(10) =22a(11) =50a(12) =43a(13) =104a(14) =100a(15) =209a(16) =206a(17) =446a(18) =418a(19) =914a(20) =886a(21) =1838a(22) =1825a(23) =3800a(24) =3664a(25) =7696a(26) =7591a(27) =15470a(28) =15370a(29) =31466