209636605domain: NAppears in sequences1/4 the number of (n+1) X (n+1) 0..3 arrays with no 2 X 2 subblock having sum 6.at n=2A1837931/4 the number of (n+1)X4 0..3 arrays with no 2X2 subblock having sum 6.at n=2A183796T(n,k) = 1/4 the number of (n+1) X (k+1) 0..3 arrays with no 2 X 2 subblock having sum 6.at n=12A183802