124651925557domain: NAppears in sequences1/4 the number of (n+1)X3 0..3 arrays with no 2X2 subblock having sum 6.at n=5A1837951/4 the number of (n+1)X7 0..3 arrays with no 2X2 subblock having sum 6.at n=1A183799T(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=22A183802