Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #13 Jun 18 2021 01:12:27
%S 3,131,131,343,48384,578875,2686862,161656161,344363443,13666666631,
%T 22113131122,1596916196951,3256487846523,115345262543511,
%U 414720808027414,15801167176110851,39249297679294293,988331239932133889,988331239932133889
%N Smallest denominator of fraction using palindromes that approximates 'phi' to at least n digits after the decimal point.
%e n=10: 22113131122/13666666631 = 1.6180339887... which is correct to ten digits after the decimal point.
%Y Numerators in A048433.
%Y Cf. A001622 (phi).
%K nonn,frac,base,more
%O 1,1
%A _Patrick De Geest_, Apr 15 1999
%E a(1) corrected and a(14)-a(19) from _Sean A. Irvine_, Jun 17 2021