610740

Appears in sequences

• Number of dissections of a convex (3n+3)-sided polygon into n pentagons and one triangle (up to equivalence).at n=7A185113
• Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=9A207847
• a(n) = 3*binomial(3*n+9, n)/(n+3).at n=7A230547
• Square table where T(n,k) = binomial(n*(n+k), k) * n/(n+k), for n>=1, k>=0, as read by antidiagonals.at n=51A299427