Πενταγωνικός αριθμός (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Πενταγωνικός αριθμός" in Greek language version.

refsWebsite

Global rank Greek rank

low place

low place

513^th place

239^th place

divye.in

How do you determine if a number N is a Pentagonal Number?

wolfram.com

mathworld.wolfram.com

Weisstein, Eric W. "Pentagonal Square Number." From MathWorld--A Wolfram Web Resource.