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 A338069 #6 Oct 19 2020 12:53:59 %S A338069 15,12,18,30,24,27,33,36,39,43,44,46,47,57,60,69,72,93,90,107,108,105, %T A338069 111,112,114,117,127,129,141,153,154,157,159,162,165,169,168,173,171, %U A338069 170,174,176,177,179,180,181,183,188,184,182,187,191,193,196,189,186,192,201,198,208 %N A338069 Even terms A336957(k) which are less than k, divided by 2, in order of appearance. %H A338069 N. J. A. Sloane, <a href="/A338069/b338069.txt">Table of n, a(n) for n = 1..20000</a> %Y A338069 Cf. A336957, A338062-A338068. %K A338069 nonn %O A338069 1,1 %A A338069 _N. J. A. Sloane_, Oct 19 2020