e/Hectagonal number

Information
has gloss	eng: A hectagonal number is a type of polygonal number, which in turn is a type of figurate number. It is so named because it can be arranged to form a hectagon, which is a 100 sided polygon. If H_n is the nth hectagonal number then H_n=n(49n-48). The first few hectagonal numbers are:
lexicalization	eng: hectagonal number
instance of	e/Figurate number