Total number of nodes summed over all lattice paths from (0,0) to (n,n) that do not go below the x-axis or above the diagonal x=y and consist of steps U=(1,1), D=(1,-1) and S=(0,1).
A286425
Total number of nodes summed over all lattice paths from (0,0) to (n,n) that do not go below the x-axis or above the diagonal x=y and consist of steps U=(1,1), D=(1,-1) and S=(0,1).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =44a(4) =285a(5) =2028a(6) =15338a(7) =120960a(8) =983108a(9) =8172094a(10) =69116592a(11) =592590616a(12) =5136777504a(13) =44928712804a(14) =395907022448
External references
- oeis: A286425