Feature Request: Add number facts from oeis

[bodograumann]

Problem description:
Currently lots of numbers are uninteresting.

Steps to Reproduce:
Lookup trivia for 2113.

The current behavior:
Returns “2113 is an unremarkable number.”

The expected behavior:
Return “2113 is a sum of 5 positive 5th powers.” e.g.

Suggested solution:
Include sequences from OEIS. E.g. there a lots of sequences containing 2113:
http://oeis.org/search?q=2113&sort=&language=english&go=Search