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 A038644 #6 Mar 16 2020 22:18:48 %S A038644 63,217,513,604,819,1387,2648,2765,3584,5167,5805,7273,8766,8920, %T A038644 10586,10719,11349,17039,19621,20188,22267,29080,35317,36506,45495, %U A038644 48728,52677,60921,64387,64827,65683,68859,69175,95769,105679,125874,127738 %N A038644 Gaps of 2 in sequence A038593 (upper terms). %H A038644 Jinyuan Wang, <a href="/A038644/b038644.txt">Table of n, a(n) for n = 1..400</a> %Y A038644 Cf. A038643. %K A038644 nonn %O A038644 1,1 %A A038644 _Jeff Burch_ %E A038644 Offset changed to 1 by _Jinyuan Wang_, Mar 16 2020