121541

Appears in sequences

• Sum along upward diagonal of Pascal triangle up to (but not including) halfway point.at n=28A010755
• T(n,n-6), array T as in A038792.at n=22A038796
• Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=8A253839