40755719

Appears in sequences

• Number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having one or three distinct values, and new values 0..3 introduced in row major order.at n=7A210397
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order.at n=28A210404