Number of n-bead bracelets (turnover necklaces) with 8 red beads and n-8 black beads.

Terms

a(0) =1a(1) =1a(2) =5a(3) =10a(4) =29a(5) =57a(6) =126a(7) =232a(8) =440a(9) =750a(10) =1282a(11) =2052a(12) =3260a(13) =4950a(14) =7440a(15) =10824a(16) =15581a(17) =21879a(18) =30415a(19) =41470a(20) =56021a(21) =74503a(22) =98254a(23) =127920a(24) =165288a(25) =211276a(26) =268228a(27) =337416a(28) =421856a(29) =523260