a(n) is the number of simple linear diagrams with n+1 chords.
A278991
a(n) is the number of simple linear diagrams with n+1 chords.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =24a(4) =211a(5) =2325a(6) =30198a(7) =452809a(8) =7695777a(9) =146193678a(10) =3069668575a(11) =70595504859
External references
- oeis: A278991