4718676

Appears in sequences

• Sequence t_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).at n=18A129875
• Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=19A253431
• Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=19A253438