"BFK" (reversible, size, unlabeled) transform of 2,1,1,1...

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =3a(5) =4a(6) =10a(7) =11a(8) =17a(9) =21a(10) =51a(11) =55a(12) =88a(13) =116a(14) =161a(15) =312a(16) =381a(17) =544a(18) =748a(19) =1055a(20) =1331a(21) =2493a(22) =2925a(23) =4279a(24) =5626a(25) =7916a(26) =10187a(27) =13872a(28) =22179a(29) =27568