254779

Appears in sequences

• Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=23A259001
• a(n) = Sum_{k=0..n} (5*k+1) * binomial(4*n+k+1,n-k)/(4*n+k+1).at n=7A390710