77627954

Appears in sequences

• Number of (n+1)X4 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.at n=7A188305
• Number of (n+1)X9 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.at n=2A188310