27920380

Appears in sequences

• Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.at n=3A251202
• Number of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.at n=3A251206
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.at n=24A251210