986306398domain: NAppears in sequencesHalf the number of (n+1) X 5 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.at n=5A184462Half the number of (n+1)X7 binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks.at n=3A184464