Number of chord diagrams of degree n with an isolated chord of length 1.

A018193

Number of chord diagrams of degree n with an isolated chord of length 1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =69a(5) =602a(6) =6531a(7) =84737a(8) =1271143a(9) =21623667a(10) =411133711a(11) =8639077230a(12) =198801435313

External references