This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A124076 #3 Mar 31 2012 13:20:33
%S A124076 0,3,23,26,229,252,255,2869,3098,3121,3124,43531,46400,46629,46652,
%T A124076 46655,776887,820418,823287,823516,823539,823542,15953673,16730560,
%U A124076 16774091,16776960,16777189,16777212,16777215,370643273,386596946
%N A124076 Numbers of the form Abs[m^m - n^n], where integers m,n>0.
%C A124076 Prime a(n) are listed in A068146(n) = {3, 23, 229, 3121, 776887, 16774091, 275311670611, ...}.
%t A124076 Take[Intersection[Flatten[Table[Abs[x^x-y^y], {x, 1, 12}, {y, 1, 12}]]], 50]
%Y A124076 Cf. A066846 = Integers of the form m^m + n^n, m and n = positive integers. Cf. A068146 = Primes of the form a^a - b^b.
%K A124076 nonn
%O A124076 1,2
%A A124076 _Alexander Adamchuk_, Nov 24 2006