185864domain: NAppears in sequencesa(n) = a(n-1) + a(n-4); first four terms are 0,1,2,3.at n=38A078467Number of Pythagorean triangles (x, y, z) with legs x < y <= 10^n.at n=4A239744Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=12A316736