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 A048434 #13 Jun 18 2021 01:12:27 %S A048434 3,131,131,343,48384,578875,2686862,161656161,344363443,13666666631, %T A048434 22113131122,1596916196951,3256487846523,115345262543511, %U A048434 414720808027414,15801167176110851,39249297679294293,988331239932133889,988331239932133889 %N A048434 Smallest denominator of fraction using palindromes that approximates 'phi' to at least n digits after the decimal point. %e A048434 n=10: 22113131122/13666666631 = 1.6180339887... which is correct to ten digits after the decimal point. %Y A048434 Numerators in A048433. %Y A048434 Cf. A001622 (phi). %K A048434 nonn,frac,base,more %O A048434 1,1 %A A048434 _Patrick De Geest_, Apr 15 1999 %E A048434 a(1) corrected and a(14)-a(19) from _Sean A. Irvine_, Jun 17 2021