36516002466domain: NAppears in sequencesNumber of (n+2)X3 0..3 arrays with each 3X3 subblock nonsingular.at n=3A184650T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock nonsingular.at n=6A184652T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock nonsingular.at n=9A184652