154072

Appears in sequences

• 1 - (5/6)*n + (5/2)*n^2 + (10/3)*n^3 + n^4.at n=19A057675
• Number of (n+1)X(2+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=12A253692