4111295

Appears in sequences

• Number of lattice paths from (0,0) to the line x+y=n that use the step set {(0,1),(1,0),(2,0),(3,0),...} and never pass below y=x.at n=21A089324
• Triangle read by rows: T(n,k) (0 <= k <= floor(n/2)) is the number of Delannoy paths of length n, having k EE's crossing the line y = x (i.e., two consecutive E steps from the line y = x+1 to the line y = x-1).at n=30A110121
• Number of Delannoy paths of length n with no EE's crossing the line y = x (i.e., no two consecutive E steps from the line y = x+1 to the line y = x-1).at n=10A110122