A197190 a(0) = 2, a(n) = Lucas(phi(n^2)) for n > 0.

2, 1, 3, 18, 47, 15127, 322, 599074578, 4870847, 192900153618, 228826127, 97418273275323406890123, 10749957122, 400010949097364802732720796316482, 358890350005878082, 11981655542024930675232002, 562882766124611619513723647, 699259133978938420550028971714417160188479526095241271647

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..60

Formula

a(n) = A000032(A002618(n)) for n > 0.

Prog

(Magma) [2] cat [Lucas(EulerPhi(n^2)): n in [1..20]];

Crossrefs

Cf. A000010, A000032, A002618, A197218, A197219.

Sequence in context: A000618 A379941 A132950 * A376084 A247482 A156364

Adjacent sequences: A197187 A197188 A197189 * A197191 A197192 A197193

Keyword

nonn

Author

Vincenzo Librandi, Oct 13 2011

Status

approved