321317domain: NAppears in sequencesNumber of (n+1)X2 0..3 arrays with the permanents of all 2X2 subblocks equal and nonzero.at n=7A204869T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the permanents of all 2 X 2 subblocks equal and nonzero.at n=28A204876