polygonal number
figurate number
octagonal number
polygonal number
hendecagonal number
figural numbers
heptagonal number
polygonal number
decagonal number
integer of the form 4n²−3n (where n ≥ 0)
pentagonal number
polygonal number
Platonic number
polyhedral number representing the Platonic solids
square number
product of some integer with itself
triangular number
figurate number
dodecagonal number
polygonal number
hexagonal number
polygonal number