Number of simple chord-labeled chord diagrams with n chords.

A278992

Number of simple chord-labeled chord diagrams with n chords.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =21a(4) =168a(5) =1968a(6) =26094a(7) =398653a(8) =6872377a(9) =132050271a(10) =2798695656a(11) =64866063276

External references