515786domain: NAppears in sequencesNumbers n such that prime(n) and pi(n) are palindromic.at n=16A124232Number 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, 0), (-1, 1, -1), (0, 1, 1), (1, -1, -1), (1, 1, -1)}.at n=12A148656