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 A093180 #4 Mar 31 2012 10:32:40 %S A093180 26829,26845,26853,26857,26865,26869,26873,26877,26885,26889,26897, %T A093180 26917,616765,616773,616777,616785,616825,616833,616837,616845,616853, %U A093180 616857,616861,616865,616869,616873,616881,616885,616889,616893,617013 %N A093180 Odd composites (including 1 in the count) where the number 1 mod 4 equals the number 3 mod 4. %C A093180 This odd composite race seems analogous to the prime number race %F A093180 Beginning with 1, run separate counts for odd composites 1 mod 4 and 3 mod 4. When the count is equal, record the number for 1 mod 4. %e A093180 a(1)=26829 is the first odd composite 1 mod 4 where the count 5238 is the same for 26835 3 mod 4 %Y A093180 Cf. A007350, A007351, A038691, A093181, A093182. %K A093180 easy,nonn %O A093180 1,1 %A A093180 _Enoch Haga_, Mar 27 2004