666522domain: NAppears in sequencesNumber of (n+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having zero or two 1's.at n=4A251211Number of (n+1)X(5+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=4A251216T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=40A251219