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 A197219 a(0) = 2, a(n) = Lucas(phi(n)) for n > 0. 4
 2, 1, 1, 3, 3, 7, 3, 18, 7, 18, 7, 123, 7, 322, 18, 47, 47, 2207, 18, 5778, 47, 322, 123, 39603, 47, 15127, 322, 5778, 322, 710647, 47, 1860498, 2207, 15127, 2207, 103682, 322, 33385282, 5778, 103682, 2207, 228826127, 322, 599074578, 15127, 103682, 39603 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 FORMULA a(n) = A000032(A000010(n)) for n > 0. MATHEMATICA Table[LucasL[EulerPhi[n]], {n, 0, 50}] PROG (Magma) [2], [Lucas(EulerPhi(n)): n in [1..60]]; // Vincenzo Librandi, Oct 13 2011 (PARI) for(n=0, 30, print1(if(n==0, 2, fibonacci(eulerphi(n)+1) + fibonacci(eulerphi(n)-1)), ", ")) \\ G. C. Greubel, Dec 22 2017 CROSSREFS Cf. A000010, A000032, A065449, A065451, A197218 (phi(Lucas(n))). Sequence in context: A219876 A216655 A242884 * A300508 A120013 A344180 Adjacent sequences: A197216 A197217 A197218 * A197220 A197221 A197222 KEYWORD nonn AUTHOR T. D. Noe, Oct 12 2011 STATUS approved

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Last modified June 17 03:50 EDT 2024. Contains 373432 sequences. (Running on oeis4.)