135910domain: NAppears in sequencesFibonacci sequence beginning 5, 17.at n=20A022141Number 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), (1, 0, -1), (1, 0, 1)}.at n=11A148731