Number of proper diagonals of the n-dimensional associahedron (i.e., diagonals that are not included in lower dimension faces).
A257887
Number of proper diagonals of the n-dimensional associahedron (i.e., diagonals that are not included in lower dimension faces).
Terms
- a(0) =1a(1) =5a(2) =34a(3) =273a(4) =2436a(5) =23391a(6) =237090a(7) =2505228a(8) =27360612a(9) =306956091a(10) =3521389998a(11) =41164654020a(12) =489017000736
External references
- oeis: A257887