Total number of nodes summed over all lattice paths from (0,0) to (n,n) using steps {(k,0), (0,k) | 0<k<=4} which never go above the diagonal x=y.
A286918
Total number of nodes summed over all lattice paths from (0,0) to (n,n) using steps {(k,0), (0,k) | 0<k<=4} which never go above the diagonal x=y.
Terms
- a(0) =1a(1) =3a(2) =21a(3) =159a(4) =1257a(5) =10046a(6) =81811a(7) =674184a(8) =5605141a(9) =46920874a(10) =394949193a(11) =3339464105a(12) =28343082002a(13) =241324470723
External references
- oeis: A286918