295 bytes added,
15:42, 10 November 2014 Take any two positive integers <m>N</m> and <m>a</m>. Show that <m>N^a</m> is the sum of <m>N</m> consecutive odd integers.
As an easy example, note that
<m>7^{13} = 96889010407 = 13841287195 + 13841287197 + 13841287199 + 13841287201 + 13841287203 + 13841287205 + 13841287207</m>
{{Bpow}}