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 A325158 #36 May 15 2019 16:32:16 %S A325158 3,6,22,44,66,179,355,710,1065,1775,3550,6745,13135,25915,102928, %T A325158 104348,312689,625378,1146408,3126535,5419351,10838702,16258053, %U A325158 47627751,80143857,165707065,411557987,657408909,1068966896,2549491779,6167950454,12335900908,21053343141,42106686282 %N A325158 Numerators of convergents to Pi using best rational approximation whose denominator is between consecutive powers of 2: [2^n, 2^(n+1)-1], where n = 0, 1, 2, ... %H A325158 Serguei Zolotov, <a href="/A325158/b325158.txt">Table of n, a(n) for n = 0..1023</a> %H A325158 E. Charrier and L. Buzer, <a href="https://doi.org/10.1016/j.dam.2009.03.005">Approximating a real number by a rational number with a limited denominator: A geometric approach</a>, Discrete Applied Mathematics, Volume 157, Issue 16, 28 August 2009, Pages 3473-3484. %H A325158 Serguei Zolotov, <a href="/A325158/a325158.py.txt">Python program to calculate b-file</a> %e A325158 The convergents are 3/1, 6/2, 22/7, 44/14, 66/21, 179/57, 355/113, 710/226, 1065/339, 1775/565, 3550/1130, 6745/2147, 13135/4181, 25915/8249, 102928/32763, ... = A325158/A325159. %Y A325158 Cf. A325159 (denominators), A002485. %K A325158 nonn %O A325158 0,1 %A A325158 _Serguei Zolotov_, Apr 04 2019