"DFK" (bracelet, size, unlabeled) transform of 2,1,1,1...

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =3a(5) =4a(6) =6a(7) =7a(8) =9a(9) =11a(10) =19a(11) =21a(12) =30a(13) =38a(14) =50a(15) =83a(16) =101a(17) =137a(18) =183a(19) =249a(20) =310a(21) =524a(22) =618a(23) =871a(24) =1125a(25) =1543a(26) =1959a(27) =2621a(28) =3934a(29) =4890