I’m a pentagonal number,
I have just two factors,
and if you put me in base 2, 4 or 16,
I’m a palindrome.
Is there anyone else like me in the number universe?
On the other hand, the Math and Multimedia Carnival is currently dormant and will resume next month. It will be hosted by Mathematics, Learning and Web 2.0. You may now submit your entries at the submission form.