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 A118168 #3 Oct 12 2013 15:18:07 %S A118168 1,1,1,2,3,3,4,5,6,6,7,8,9,10,10,11,12,13,14,14,15,16,17,18,18,19,20, %T A118168 21,22,22,23,24,25,26,27,27,28,29,30,31,32,32,33,34,35,36,37,37,38,39, %U A118168 40,41,42,42,43,44,45,46,47,47,48,49,50,51,52,52,53,54,55,56,57,57,58,59 %N A118168 a(n) = x for which abs(x^x-n!) is minimal. %e A118168 3! = 6, the closest x^x can get to 6 is 2^2, so a(3) = 2 %Y A118168 Cf. A118167, A118170. %K A118168 easy,nonn %O A118168 0,4 %A A118168 _Olaf Voß_, Apr 13 2006