Number of North-East lattice paths from (0,0) to (n,n) that have exactly three east steps below the subdiagonal y = x-1.
A268370
Number of North-East lattice paths from (0,0) to (n,n) that have exactly three east steps below the subdiagonal y = x-1.
Terms
- a(0) =5a(1) =24a(2) =95a(3) =356a(4) =1309a(5) =4784a(6) =17472a(7) =63920a(8) =234498a(9) =863056a(10) =3187041a(11) =11807740a(12) =43885725a(13) =163601760a(14) =611625660a(15) =2292665760a(16) =8615485590a(17) =32451382800a(18) =122499978510a(19) =463369822344
External references
- oeis: A268370