537363domain: NAppears in sequencesNumbers k such that 2*9^k + 1 is prime.at n=28A056802Number 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, 0, 1), (0, 1, 0), (1, -1, -1), (1, 0, 0)}.at n=11A149928