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 A139180 #2 Mar 30 2012 17:37:44
%S A139180 2,172603687936,3910825640696988096,396867211295273131775761,
%T A139180 13586030059671762261567625351,4218282992523473247642107344280879104,
%U A139180 5572272365289149102816175194628254483025277
%N A139180 Smallest number m greater than 1 such that m=(Sum_{i=1..k} d_i!)^n where d_1 d_2 ... d_k is the decimal expansion of m, or 0 if no m exists.
%C A139180 A139181(n)=A139180(n)^(1/n).
%e A139180 172603687936=(1!+7!+2!+6!+0!+3!+6!+8!+7!+9!+3!+6!)^2
%Y A139180 Cf. A014080, A137604, A137605.
%K A139180 base,nonn
%O A139180 1,1
%A A139180 _Farideh Firoozbakht_, Apr 22 2008