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 A137183 #10 Dec 13 2019 02:55:08 %S A137183 1,15,43,99,127,141,169,211,267,393,421,463,477,519,631,645,673,729, %T A137183 841,855,883,897,925,981,1009,1023,1093,1107,1219,1233,1261,1275,1303, %U A137183 1387,1401,1471,1485,1597,1611,1639,1723,1737,1765,1933,2031,2059,2115,2283 %N A137183 Lucky numbers (A000959) which are congruent to 1 mod 7. %H A137183 Amiram Eldar, <a href="/A137183/b137183.txt">Table of n, a(n) for n = 1..10000</a> %Y A137183 Intersection of A000959 and A016993. %K A137183 nonn %O A137183 1,2 %A A137183 _N. J. A. Sloane_, Mar 07 2008