261333

Appears in sequences

• Number of (4+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=29A250759
• Expansion of Product_{k>=1} (1 + (1 + x + x^2) * x^k).at n=43A309173