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 A137186 #10 Dec 13 2019 02:56:20 %S A137186 25,67,151,193,235,319,361,487,529,613,655,739,781,823,991,1117,1201, %T A137186 1285,1369,1495,1579,1663,1705,1831,1915,2083,2125,2209,2251,2335, %U A137186 2419,2461,2545,2587,2671,2755,2797,2923,3007,3049,3091,3133,3175,3259,3301,3427 %N A137186 Lucky numbers (A000959) which are congruent to 4 mod 7. %H A137186 Amiram Eldar, <a href="/A137186/b137186.txt">Table of n, a(n) for n = 1..10000</a> %Y A137186 Intersection of A000959 and A017029. %K A137186 nonn %O A137186 1,1 %A A137186 _N. J. A. Sloane_, Mar 07 2008