61576domain: NAppears in sequencesNumber of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)=2.at n=24A212895Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=12A258550