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 A131443 #8 Aug 30 2019 03:59:54 %S A131443 1,3,3,19,97,97,453,65239,36697,5871521,3075559,775040869,10075531303, %T A131443 10075531303,2115861573641,2115861573641,22135167231937, %U A131443 941750751322411,39365181405276781,3936518140527678109 %N A131443 Numerators of n-th approximation of factorial (also called harmonic) expansion of the golden section phi:=(1+sqrt(5))/2. %C A131443 Denominators are given in A131444. Rationals in lowest terms. %H A131443 W. Lang, <a href="/A131443/a131443.txt">Rationals and values</a>. %F A131443 a(n)=numerator(r(n)), with r(n):=sum(b(k)/k!,n=1..n) with b(k):=A068451(k ) (factorial expansion of phi). %e A131443 Rationals r(n):[1, 3/2, 3/2, 19/12, 97/60, 97/60, 453/280, 65239/40320, ...]. %K A131443 nonn,frac,easy %O A131443 1,2 %A A131443 _Wolfdieter Lang_, Aug 07 2007