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 A295564 #7 Dec 04 2017 18:38:35 %S A295564 0,2,4,5,9,12,15,16,22,23,31,38,39,40,57,62,64,67,68,73,90,99,101,107, %T A295564 110,117,126,133,143,155,160,162,165,166,171,175,177,182,194,198,207, %U A295564 208,213,224,236,241,245,246,248,260,261,265,266,285,291,293,297,298,304,311,328,329,332,337,338,341 %N A295564 Numbers k such that A295563(k) <= k. %H A295564 Rémy Sigrist, <a href="/A295564/b295564.txt">Table of n, a(n) for n = 1..15000</a> %Y A295564 Cf. A269526, A274528, A295563, A295565, A295566, A295567, %K A295564 nonn %O A295564 1,2 %A A295564 _N. J. A. Sloane_, Nov 29 2017