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 A338065 #11 Oct 19 2020 00:01:20 %S A338065 1,3,7,6,5,9,11,10,13,14,17,19,23,20,21,15,28,12,38,18,25,22,31,26,35, %T A338065 29,37,34,41,40,42,30,49,24,50,27,55,33,76,36,56,39,51,43,45,44,48,46, %U A338065 54,47,58,52,53,59,61,62,67,65,63,57,68,60,77,66,91,70,71,73,88,74,79,80,69,82 %N A338065 Even terms in A336957, divided by 2, in order of appearance. %H A338065 N. J. A. Sloane, <a href="/A338065/b338065.txt">Table of n, a(n) for n = 1..20001</a> %Y A338065 Cf. A336957, A338062-A338069. %K A338065 nonn %O A338065 1,2 %A A338065 _N. J. A. Sloane_, Oct 18 2020