4357148705domain: NAppears in sequencesNumber of (n+1)X5 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=4A205211Number of (n+1)X6 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=3A205212