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 A278350 #11 Nov 21 2016 15:11:31
%S A278350 0,0,1,1,1,4,1,9,18,15,1,96,1,41,370,435,1,1432,149,3565,5906,287,1,
%T A278350 33696,15025,753,106562,129651,1,544040,2973,960597,1782178,5167,
%U A278350 2413385,10534320,501497,1397033,31758946,60862155,62157,149373496,1
%N A278350 Cototient of Fibonacci(n).
%C A278350 a(n) = 1 if Fibonacci(n) is prime.
%F A278350 a(n) = A051953(A000045(n)).
%F A278350 a(n) = A000045(n) - A065449(n) for n > 0.
%t A278350 Table[Fibonacci[n] - EulerPhi[Fibonacci[n]], {n, 40}] (* _Alonso del Arte_, Nov 21 2016 *)
%o A278350 (PARI) a(n) = fibonacci(n) - eulerphi(fibonacci(n));
%Y A278350 Cf. A000045, A051953, A065449.
%K A278350 nonn
%O A278350 1,6
%A A278350 _Altug Alkan_, Nov 19 2016