1393236domain: NAppears in sequencesprime(2n) + prime(n) == 0 (mod n).at n=28A066896Number 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, 1, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.at n=11A149400