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 A181058 #17 Nov 16 2024 02:54:55 %S A181058 2,2,2,2,5,2,19,5,19,5,257,5,827,19,73,73,7793,19,23159,73,827,257, %T A181058 196687,73,67931,827,23159,827,4528949,73,12717703,7793,67931,7793, %U A181058 563987,827,274253209,23159,563987,7793,2088145739,827,5738374519,67931 %N A181058 a(n) = prime(Fibonacci(phi(n))), where prime = A000040, Fibonacci = A000045 and phi = A000010. %C A181058 Phi is Euler's totient function A000010. %H A181058 Amiram Eldar, <a href="/A181058/b181058.txt">Table of n, a(n) for n = 1..88</a> %F A181058 a(n) = A000040(A065451(n)) = A030427(A000010(n)). - _Antti Karttunen_, Dec 06 2017 %e A181058 a(7) = 19 since prime(fib(phi(7))) = prime(fib(6)) = prime(8) = 19 that is the 8th prime. %t A181058 f[n_] := Prime@ Fibonacci@ EulerPhi@ n; Array[f, 44] (* _Robert G. Wilson v_, Oct 02 2010 *) %o A181058 (PARI) A181058(n) = prime(fibonacci(eulerphi(n))); \\ _Antti Karttunen_, Dec 06 2017 %Y A181058 Cf. A000010, A000040, A000045, A030427, A065451, A181056. %K A181058 nonn %O A181058 1,1 %A A181058 _Carmine Suriano_, Oct 01 2010 %E A181058 More terms from _Robert G. Wilson v_, Oct 02 2010