225180domain: NAppears in sequencesNumbers expressible in more than one way as 6^x-y^2.at n=28A134989Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.at n=13A148097