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A197191 a(n) = phi(Lucas(n^2)). 1

%I #14 Sep 08 2022 08:45:59

%S 1,1,6,36,2206,150000,13685760,16794009904,23538338288640,

%T 40111742758242240,678603619866009600000,19289305175281390070751204,

%U 619856418580365858926902640640,208006459829483370218035382709089280,78451383926677134672195807581733722937984

%N a(n) = phi(Lucas(n^2)).

%H Vincenzo Librandi, <a href="/A197191/b197191.txt">Table of n, a(n) for n = 0..20</a>

%t Table[EulerPhi[LucasL[n^2]], {n, 0, 15}] (* _Vincenzo Librandi_, Oct 04 2013 *)

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

%Y Cf. A197218, A197219.

%K nonn

%O 0,3

%A _Vincenzo Librandi_, Oct 13 2011

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Last modified June 14 15:00 EDT 2024. Contains 373400 sequences. (Running on oeis4.)