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 A038643 #8 Mar 17 2020 06:54:46 %S A038643 61,215,511,602,817,1385,2646,2763,3582,5165,5803,7271,8764,8918, %T A038643 10584,10717,11347,17037,19619,20186,22265,29078,35315,36504,45493, %U A038643 48726,52675,60919,64385,64825,65681,68857,69173,95767,105677,125872,127736 %N A038643 Gaps of 2 in sequence A038593 (lower terms). %H A038643 Jinyuan Wang, <a href="/A038643/b038643.txt">Table of n, a(n) for n = 1..400</a> %Y A038643 Cf. A038593, A038644. %K A038643 nonn %O A038643 1,1 %A A038643 _Jeff Burch_ %E A038643 Offset changed to 1 by _Jinyuan Wang_, Mar 16 2020