518220

Appears in sequences

• Number of (n+2) X (5+2) 0..1 arrays with every 2 X 2 and 3 X 3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=23A253507
• Expansion of 1/sqrt((1-x)^3 * (1-5*x)).at n=9A383949