A070524 - OEIS

%I #7 Jan 03 2017 02:27:50

%S 0,2,7,5,341,3,55987,257,46873,205,11111111111,241,9726655034461,

%T 39991,14709241,16777217,19676527011956855057,46441,

%U 41660902667961039785743,16519105,8177824843189,9090909091,357686347714896679177439424707

%N Value of n-th cyclotomic polynomial at phi(n).

%e n=6: the 6th cyclotomic polynomial is 1 - x + xx, phi(6)=2, C(6, phi(6)) = C(6,2) = 1 - 2 + 4 = 3 = a(6).

%t Table[Cyclotomic[w, EulerPhi[w]], {w, 1, 25}]

%Y Cf. A070518-A070523.

%K easy,nonn

%O 1,2

%A _Labos Elemer_, May 02 2002