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 A189123 #8 Mar 30 2012 17:27:06 %S A189123 21080618,63241604,67139098,116385658,117448688,126483083,152523860, %T A189123 189724562,212400458,229762259,318689258,348330652,353942783, %U A189123 366873514,373603732,379448999,385159320,404764540,409108300,460759642,465722100,477258719,498197068,511069678,516743639,519835084,538858312,545438698,545790940,546853138,574842670,575550972,581106238,590785918 %N A189123 Positive integers n such that A005245(n-i) + A005245(i) < A005245(n-1) + 1 for some i, 1 < i < n. %C A189123 Counterexamples to the first conjecture of David Wilson on A005245. %C A189123 a(1) was found by Igor aka CD_Eater from Moscow in January, 2008 %C A189123 Prime terms are listed in A189125. %H A189123 <a href="http://dxdy.ru/topic11665.html">Discussion at dxdy.ru</a> (in Russian) %H A189123 Janis Iraids, <a href="http://www.ltn.lv/~podnieks/stud/expmath/Janis20100622.txt">Values of a(n) below 1.5*10^9</a> %H A189123 Martin N. Fuller, <a href="/A005245/a005245.c.txt">C program for A005245</a> %Y A189123 Cf. A005245, A189124, A189125 %K A189123 nonn %O A189123 1,1 %A A189123 _Max Alekseyev_, Apr 17 2011