153820domain: NAppears in sequencesShallit sequence S(14,23), a(n)=[ a(n-1)^2/a(n-2)+1 ].at n=18A010923Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.at n=9A150442