146

146 is an octahedral number, the number of spheres that can be packed into in a regular octahedron with six spheres along each edge.For an octahedron with seven spheres along each edge, the number of spheres on the surface of the octahedron is again 146. It is also possible to arrange 146 disks in the plane into an irregular octagon with six disks on each side, making 146 an octo number.