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 A131445 #11 Aug 30 2019 04:00:39
%S A131445 3,3,3,25,47,2261,15833,42223,42223,11400211,1672031,136802537,
%T A131445 2173640311,2173640311,342348348983,5975534818613,372475003693547,
%U A131445 21511925347007,76431870757915873,56199904969055789,4223866541884824563
%N A131445 Numerators of n-th approximation of factorial (also called harmonic) expansion of Pi.
%C A131445 Denominators are given in A131446. Rationals in lowest terms.
%H A131445 W. Lang, <a href="/A131445/a131445.txt">Rationals and values</a>.
%F A131445 a(n) = numerator(r(n)), with r(n) = Sum_{k=1..n} b(k)/k! with b(k) = A075874(k) (factorial expansion of Pi).
%e A131445 Rationals r(n): 3, 3, 3, 25/8, 47/15, 2261/720, 15833/5040, 42223/13440, 42223/13440, ...
%K A131445 nonn,frac,easy
%O A131445 1,1
%A A131445 _Wolfdieter Lang_, Aug 07 2007