Number of necklaces with 8 black beads and n-8 white beads.

Terms

a(0) =1a(1) =1a(2) =5a(3) =15a(4) =43a(5) =99a(6) =217a(7) =429a(8) =810a(9) =1430a(10) =2438a(11) =3978a(12) =6310a(13) =9690a(14) =14550a(15) =21318a(16) =30667a(17) =43263a(18) =60115a(19) =82225a(20) =111041a(21) =148005a(22) =195143a(23) =254475a(24) =328756a(25) =420732a(26) =534076a(27) =672452a(28) =840652a(29) =1043460