1545878

Appears in sequences

• Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally and vertically.at n=8A257205
• a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 187) or the same sequence for the mesh pattern (12, 442).at n=14A289592