1921749372

Appears in sequences

• Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.at n=5A187134
• Number of (n+1)X7 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.at n=2A187137