15876096

Appears in sequences

• a(n) = 4^n*(3*n)!/((n+1)!*(2*n+1)!).at n=7A006335
• Array by antidiagonals: Number of planar lattice walks of length 3n+2k starting at (0,0) and ending at (k,0), remaining in the first quadrant and using only NE,W,S steps.at n=35A098273
• Number A(n,k) of solid standard Young tableaux of shape [[n*k,n],[n]]; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=43A176129
• Number A(n,k) of solid standard Young tableaux of shape [[{n}^k],[n]]; square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=43A214722
• Number A(n,k) of n*(k+1)-step k-dimensional nonnegative closed lattice walks starting at the origin and using steps that increment all components or decrement one component by 1; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=52A340591
• Number of unordered pairs of disjoint self-avoiding paths with nodes that cover all vertices of a convex labeled n-gon; one-node paths are allowed.at n=16A363964