75808

Appears in sequences

• a(n) = T(2n+4,n), array T as in A055818.at n=5A055828
• Number of (1+1) X (n+1) 0..3 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=17A250878