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 A352710 #8 Mar 30 2022 09:41:32
%S A352710 3,5,7,20,11,13,32,17,19,44,23,27,216,29,31,35,280,37,117,41,43,92,47,
%T A352710 51,153,53,57,116,59,61,65,520,67,207,71,73,77,616,79,164,83,87,261,
%U A352710 89,93,95,760,97,105,101,103,212,107,109,333,113,920,119,952,123,125,1000,127,135,131
%N A352710 Least k such that A352483(k) = 2*n-1, or -1 if no such k exists.
%H A352710 Michel Marcus, <a href="/A352710/b352710.txt">Table of n, a(n) for n = 1..10000</a>
%F A352710 a(n) = A351913(2*n-1).
%o A352710 (PARI) f(n) = my(d=numdiv(n)); denominator(n*d/(n-d)); \\ A352483
%o A352710 a(n) = {my(k=3, q=2*n-1); while (f(k) != q, k++); k; }
%Y A352710 Cf. A352483.
%Y A352710 Bisection of A351913.
%K A352710 nonn
%O A352710 1,1
%A A352710 _Michel Marcus_, Mar 30 2022