294140

Appears in sequences

• Triangulations of the disk G_{2,n}.at n=9A005498
• Triangle, read by rows, T(n, k) = binomial(3*n, 2*k) + binomial(3*n, 2*(n-k)).at n=29A154919
• Triangle, read by rows, T(n, k) = binomial(3*n, 2*k) + binomial(3*n, 2*(n-k)).at n=34A154919
• Number of right isosceles triangles that can be formed from the n^2 points of n X n grid of points (or geoboard).at n=28A187452