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

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =6a(5) =10a(6) =18a(7) =22a(8) =30a(9) =42a(10) =98a(11) =110a(12) =174a(13) =234a(14) =346a(15) =798a(16) =958a(17) =1458a(18) =2058a(19) =2990a(20) =4022a(21) =9234a(22) =10746a(23) =16774a(24) =22950a(25) =33682a(26) =44562a(27) =64182a(28) =126230a(29) =154778