689349

Appears in sequences

• Number of ways of placing non-attacking knights on an n X n chessboard symmetric about the diagonal and under 90-degree rotation.at n=16A130712
• Number 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, -1)}.at n=12A148399