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 A038635 #14 Mar 17 2020 06:49:02 %S A038635 24,54,406,690,789,1398,1590,3522,8071,9803,19280,22768,23158,25666, %T A038635 25734,28899,30015,37340,37931,47388,53806,65612,84494,89784,99611, %U A038635 103953,107189,107839,107993,116821,140890,159386,160636,161530,166890,179449,190893,268458 %N A038635 Numbers k such that k-th and (k+1)-st term of A038593 differ by 4. %H A038635 Giovanni Resta, <a href="/A038635/b038635.txt">Table of n, a(n) for n = 1..136</a> %Y A038635 Cf. A038593, A038647, A038648. %K A038635 nonn %O A038635 1,1 %A A038635 _Jeff Burch_ %E A038635 More terms from and one term corrected by _Jinyuan Wang_, Mar 16 2020