Stella octangula number

In mathematics, a stella octangula number is a figurate number based on the stella octangula, of the form n(2n2 − 1).

The sequence of stella octangula numbers is

0, 1, 14, 51, 124, 245, 426, 679, 1016, 1449, 1990, ... (sequence A007588 in the OEIS)

Only two of these numbers are square.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.