564143008386domain: NAppears in sequencesNumber of (n+2)X4 0..3 arrays with each 3X3 subblock singular.at n=3A184661T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock singular.at n=11A184663T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock singular.at n=13A184663