826524domain: NAppears in sequencesBase 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,2,1.at n=9A037765Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.at n=8A316515