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 A038638 #10 Mar 17 2020 06:50:04 %S A038638 2,8,10,16,25,34,44,55,68,75,80,84,102,106,120,133,139,160,172,184, %T A038638 196,208,233,239,262,279,288,290,312,320,352,353,355,362,384,417,419, %U A038638 424,462,484,500,524,529,539,544,561,567,582,584,610,619,624,669,684,718 %N A038638 Numbers k such that k-th and (k+1)-st term of A038593 differ by 7. %H A038638 Jinyuan Wang, <a href="/A038638/b038638.txt">Table of n, a(n) for n = 1..1000</a> %Y A038638 Cf. A038593, A038653, A038654. %K A038638 nonn %O A038638 1,1 %A A038638 _Jeff Burch_