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 A075735 #19 Apr 23 2022 23:01:43 %S A075735 1,1,21,34,55,377,4181,6765,17711,121393,196418,317811,1346269, %T A075735 2178309,5702887,102334155,165580141,32951280099,53316291173, %U A075735 139583862445,956722026041,2504730781961,10610209857723,308061521170129 %N A075735 Squarefree Fibonacci numbers with an even number of prime factors (mu(n)=1). %H A075735 Amiram Eldar, <a href="/A075735/b075735.txt">Table of n, a(n) for n = 1..505</a> (terms 1..100 from T. D. Noe) %e A075735 21 is a Fibonacci number and 21=3*7, 34 is a Fibonacci numbers and 34=2*17, ... %p A075735 with(combinat, fibonacci): m1_fib := proc(n); if (numtheory[mobius](fibonacci(n))=1) then RETURN(fibonacci(n)); fi; end: seq(m1_fib(i), i=1..100); %Y A075735 Subsequence of A061305 (squarefree Fibonacci numbers). %Y A075735 Cf. A000045, A030229, A074691. %Y A075735 Cf. A022307, A053409, A072381. %K A075735 easy,nonn %O A075735 1,3 %A A075735 _Jani Melik_, Oct 07 2002