Number of n-crossing knots with alternating braids of 3 strands.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =8a(5) =0a(6) =23a(7) =0a(8) =71a(9) =0a(10) =225a(11) =0a(12) =746a(13) =0a(14) =2555a(15) =0a(16) =8999a(17) =0a(18) =32297a(19) =0