Number of pairs of Dyck paths of semilength n such that the midpoint of the first is above the midpoint of the second.
A355481
Number of pairs of Dyck paths of semilength n such that the midpoint of the first is above the midpoint of the second.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =49a(5) =441a(6) =4806a(7) =52956a(8) =614713a(9) =7341697a(10) =90118054a(11) =1130414649a(12) =14447230854a(13) =187609607862
External references
- oeis: A355481