18436719991domain: NAppears in sequencesNumber of (n+1)X4 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=6A205210Number of (n+1)X8 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.at n=2A205214