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 A131494 #16 Mar 19 2015 09:38:16 %S A131494 5825,561220,7755606,2888937688,6264901444,23619873712,571269301377, %T A131494 713764980661,869172568999,5532978040527,7642834168124, %U A131494 203889078936944,40287674650484416,243168646125929188,940265659937347772 %N A131494 Values of n such that e^n starts with the digits n. %e A131494 561220 is a term of this sequence because e^561220 = 561220.7799... * 10^243729, which starts with 561220. %o A131494 (PARI) e=exp(1);s=1;for(i=1,10000000,s=s*e; if(s-i>11,s=s/10,); if(floor(s)==i,printp1(i,", "),)) %Y A131494 Cf. A100129 %K A131494 more,nonn,base %O A131494 1,1 %A A131494 _Randy L. Ekl_, Aug 12 2007 %E A131494 a(4)-a(15) from _Max Alekseyev_, Sep 12 2013