Number of rational knots with n crossings and unknotting number = 1 (chiral pairs counted only once).

A078477

Number of rational knots with n crossings and unknotting number = 1 (chiral pairs counted only once).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =6a(6) =7a(7) =15a(8) =15a(9) =30a(10) =31a(11) =63a(12) =63a(13) =126a(14) =127a(15) =255a(16) =255a(17) =510a(18) =511a(19) =1023a(20) =1023a(21) =2046a(22) =2047a(23) =4095a(24) =4095a(25) =8190a(26) =8191a(27) =16383a(28) =16383a(29) =32766

External references