A197191 a(n) = phi(Lucas(n^2)).

1, 1, 6, 36, 2206, 150000, 13685760, 16794009904, 23538338288640, 40111742758242240, 678603619866009600000, 19289305175281390070751204, 619856418580365858926902640640, 208006459829483370218035382709089280, 78451383926677134672195807581733722937984

Offset: 0

Author

Vincenzo Librandi, Oct 13 2011

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..20

Crossrefs

Cf. A197218, A197219.

Programs

Magma

[EulerPhi(Lucas(n^2)): n in [0..15]]

Mathematica

Table[EulerPhi[LucasL[n^2]], {n, 0, 15}] (* Vincenzo Librandi, Oct 04 2013 *)