173129

Appears in sequences

• Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=19A253838
• Expansion of Product_{k>=1} (1 - (x*(1 + x))^k).at n=29A309575