Number of pairs of Dyck paths of semilength n such that the midpoint of the first is not below the midpoint of the second.
A357652
Number of pairs of Dyck paths of semilength n such that the midpoint of the first is not below the midpoint of the second.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =21a(4) =147a(5) =1323a(6) =12618a(7) =131085a(8) =1430187a(9) =16297347a(10) =191987562a(11) =2325379147a(12) =28821761290a(13) =364290802138
External references
- oeis: A357652