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 A075732 #9 Aug 09 2015 14:29:06 %S A075732 3,21,34,144,987,2584,6765,46368,75025,196418,317811,2178309,14930352, %T A075732 102334155,701408733,1134903170,4807526976,7778742049,12586269025, %U A075732 32951280099,86267571272,225851433717,1548008755920,6557470319842 %N A075732 Fibonacci numbers F(k) for k not squarefree (A013929). %e A075732 4 is a nonsquarefree number and Fibonacci(4)=3, 8 is a nonsquarefree number and Fibonacci(8)=21,... %p A075732 with(combinat, fibonacci): fib_ndsk := proc(n); if (numtheory[issqrfree](n)='false') then # or # if (mobius(n)=0) then RETURN(fibonacci(n)) fi; end: seq(fib_ndsk(i), i=1..100); %t A075732 Fibonacci[#]&/@DeleteCases[Range[100],_?SquareFreeQ] (* _Harvey P. Dale_, Apr 20 2011 *) %Y A075732 Cf. A000045, A013929, A061899. %K A075732 easy,nonn %O A075732 0,1 %A A075732 _Jani Melik_, Oct 07 2002