Question 952711
<pre>
  {{{1 = 1^1-0 =    1-0 = 1}}}
  {{{3 = 2^2-1 =    4-1 = 3}}}
 {{{25 = 3^3-2 =   27-2 = 25}}}
{{{253 = 4^4-3 =  256-3 = 253}}}

next term

    {{{5^5-4 = 3125-4 = 3121}}}

So the nth term is 

    {{{n^n-(n-1) = n^n-n+1}}}

Edwin</pre>