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 A171668 #10 Aug 08 2024 06:44:07
%S A171668 34,55,144,10946,46368,196418,9227465,1134903170,4052739537881,
%T A171668 117669030460994,420196140727489673,12200160415121876738,
%U A171668 3928413764606871165730,22698374052006863956975682,68330027629092351019822533679447,13598018856492162040239554477268290
%N A171668 Fibonacci numbers sandwiched between two numbers having same number of divisors.
%H A171668 Amiram Eldar, <a href="/A171668/b171668.txt">Table of n, a(n) for n = 1..70</a>
%t A171668 f[n_]:=Length[Divisors[n]]; lst={};Do[fi=Fibonacci[n];If[f[fi-1]==f[fi+1],AppendTo[lst,fi]],{n,170}];lst
%Y A171668 Cf. A000005, A000045, A005237, A005238, A067889, A171666, A171667.
%K A171668 nonn
%O A171668 1,1
%A A171668 _Vladimir Joseph Stephan Orlovsky_, Dec 14 2009
%E A171668 a(15)-a(16) from _Amiram Eldar_, Aug 08 2024