"DFJ" (bracelet, size, labeled) transform of 2,2,2,2...

Terms

a(0) =1a(1) =2a(2) =2a(3) =14a(4) =18a(5) =62a(6) =566a(7) =1094a(8) =3954a(9) =17150a(10) =646182a(11) =1460054a(12) =7152294a(13) =32145622a(14) =215489878a(15) =15152657534a(16) =41699885554a(17) =237383066942