a(n) is the total number of down steps between the 3rd and 4th up steps in all 3-Dyck paths of length 4*n.
A334646
a(n) is the total number of down steps between the 3rd and 4th up steps in all 3-Dyck paths of length 4*n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =118a(4) =409a(5) =2368a(6) =15750a(7) =112716a(8) =845295a(9) =6551208a(10) =52035714a(11) =421286280a(12) =3463401007a(13) =28832656408a(14) =242565115858
External references
- oeis: A334646