77815012608domain: NAppears in sequencesNumber of (n+1)X5 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.at n=3A185802T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.at n=24A185807