%I #10 Mar 30 2012 17:36:33
%S 1,16,96,256,2500,9216,62496,147456,1499904,6250000,39037504,84934656,
%T 971882496,3905750016,23437500000,57415827456,610351562496,
%U 2249712009216,15258773437504,39062500000000,366140629499904,1523926718550016,9536743164062496,16231265527136256,238418579101562500
%N Generalized Euler phi function (for p=5).
%C For n>=2 a(n) is the number of n X n circulant invertible matrices over GF(5)
%o (PARI) /* see A003473, there set p=5 */
%Y Cf. A003473 (p=2), A003474 (p=3).
%K nonn
%O 1,2
%A _Joerg Arndt_, Jul 03 2011