5848268518domain: NAppears in sequencesNumber of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock nonsingular.at n=3A183689Number of (n+1)X5 0..2 arrays with every 2X2 subblock nonsingular.at n=3A183693T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock nonsingular.at n=24A183698