1236875696domain: NAppears in sequencesNumber of (n+1)X4 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=5A205210Number of (n+1)X7 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=2A205213