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 A100637 #14 Dec 07 2019 12:18:24 %S A100637 2,3,4,5,6,7,8,9,9,10,11,11,12,13,14,15,15,16,16,17,18,18,19,20,21,21, %T A100637 22,23,23,24,24,24,25,26,27,28,29,30,30,30,30,30,31,32,32,33,34,34,34, %U A100637 35 %N A100637 Trisection of A000720. %H A100637 Daniel Forgues, <a href="/A100637/b100637.txt">Table of n, a(n) for n = 0..33332</a> %o A100637 (Sage) [prime_pi(3*n) for n in range(1, 51)] # _Zerinvary Lajos_, Jun 06 2009 %Y A100637 Cf. A000720, A099802. %K A100637 easy,nonn %O A100637 0,1 %A A100637 _Giovanni Teofilatto_, Dec 04 2004 %E A100637 Entry for n = 46 corrected and edited to a(n) = 34 (was 33) by _Daniel Forgues_, Feb 02 2009