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 A137188 #10 Dec 13 2019 02:56:37 %S A137188 13,69,111,195,223,237,307,321,349,391,433,475,489,517,559,601,615, %T A137188 643,685,699,727,741,769,867,895,937,979,993,1021,1105,1147,1189,1203, %U A137188 1231,1245,1329,1357,1441,1455,1497,1567,1693,1749,1777,1819,1833,1945,1959 %N A137188 Lucky numbers (A000959) which are congruent to 6 mod 7. %H A137188 Amiram Eldar, <a href="/A137188/b137188.txt">Table of n, a(n) for n = 1..10000</a> %Y A137188 Intersection of A000959 and A017053. %K A137188 nonn %O A137188 1,1 %A A137188 _N. J. A. Sloane_, Mar 07 2008