Number of circular chord diagrams with n chords, up to rotational symmetry.
A007474
Number of circular chord diagrams with n chords, up to rotational symmetry.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =7a(5) =36a(6) =300a(7) =3218a(8) =42335a(9) =644808a(10) =11119515a(11) =213865382a(12) =4537496680a(13) =105270612952
External references
- oeis: A007474