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A061254 Odd composite numbers n such that primitive part of Fibonacci(n) (see A061446) is prime. 7
9, 15, 21, 33, 35, 39, 45, 51, 63, 65, 75, 93, 105, 111, 119, 121, 123, 135, 145, 185, 195, 201, 207, 209, 225, 231, 235, 245, 285, 287, 299, 301, 321, 335, 363, 399, 423, 453, 473, 693, 707, 771, 1047, 1113, 1215, 1365, 1371, 1387, 1533, 1537 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

David Broadhurst, Table of n, a(n) for n=1..151 yielding primes or probable primes

J. Brillhart, P. L. Montgomery and R. D. Silverman, Tables of Fibonacci and Lucas factorizations, Math. Comp. 50 (1988), 251-260, S1-S15. Math. Rev. 89h:11002.

MATHEMATICA

A061446[n_] := Product[Fibonacci[d]^MoebiusMu[n/d], {d, Divisors[n]}];

Select[Range[1, 1999, 2], CompositeQ[#] && PrimeQ[A061446[#]]&] (* Jean-François Alcover, Jul 04 2019 *)

CROSSREFS

Cf. A061446, A061447, A061445, A061442, A061443.

Sequence in context: A225513 A331662 A007962 * A175626 A096788 A050991

Adjacent sequences:  A061251 A061252 A061253 * A061255 A061256 A061257

KEYWORD

nonn

AUTHOR

David Broadhurst, Jun 10 2001

EXTENSIONS

Definition corrected by T. D. Noe, Dec 14 2006

STATUS

approved

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Last modified September 17 03:42 EDT 2021. Contains 347478 sequences. (Running on oeis4.)