17984702194domain: NAppears in sequencesNumber of (n+2)X3 0..3 arrays with each 3X3 subblock singular.at n=4A184660T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock singular.at n=10A184663T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock singular.at n=14A184663