Complex sentence: The name "Haüy octahedral number" comes from the work of René Just Haüy, an early 19th-century French minerologist whose "Haüy construction" of an octahedron as the limiting shape of concentric layers of cubes uses a centered octahedral number of cubes.
Split into simpler sentences: The name "Haüy octahedral number" comes from the work of René Just Haüy, an early 19th-century French minerologist. His "Haüy construction" of an octahedron as the limiting shape of concentric layers of cubes uses a centered octahedral number of cubes.