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 A071617 #12 Jul 30 2024 17:56:38 %S A071617 1,4,256,46656,10000000000,8916100448256,18446744073709551616, %T A071617 39346408075296537575424,341427877364219557396646723584, %U A071617 33145523113253374862572728253364605812736,205891132094649000000000000000000000000000000 %N A071617 a(n) = phi(p)^phi(p) where p = prime(n). %F A071617 a(n) = A063439(A000040(n)). %F A071617 a(n) = A000312(A006093(n)). %p A071617 a:= n-> (p-> (p-1)^(p-1))(ithprime(n)): %p A071617 seq(a(n), n=1..11); # _Alois P. Heinz_, Jul 30 2024 %o A071617 (PARI) a(n) = my(q=eulerphi(prime(n))); q^q; \\ _Michel Marcus_, Jul 30 2024 %Y A071617 Cf. A000010, A000312, A006093, A063439, A000040. %K A071617 easy,nonn %O A071617 1,2 %A A071617 _Labos Elemer_, May 29 2002 %E A071617 a(11) from _Sean A. Irvine_, Jul 30 2024