Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k)|0<k<=4} which never go above the line y=x.
A175891
Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k)|0<k<=4} which never go above the line y=x.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =29a(4) =185a(5) =1226a(6) =8553a(7) =61642a(8) =455337a(9) =3429002a(10) =26229691a(11) =203237747a(12) =1591820564a(13) =12582288455a(14) =100241042348a(15) =804090987555
External references
- oeis: A175891