142076domain: NAppears in sequencesNumber of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)=2.at n=31A212895Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=9A316416