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A061445 Composite numbers n such that primitive part of Lucas(n) (see A061447) is prime. 6
9, 10, 14, 15, 16, 20, 21, 26, 27, 30, 33, 36, 38, 49, 56, 62, 66, 68, 70, 72, 76, 78, 80, 86, 90, 91, 110, 117, 120, 121, 136, 140, 144, 164, 168, 172, 178, 202, 207, 220, 261, 284, 328, 354, 357, 420, 423, 458, 459, 468, 480, 504, 513, 530, 586, 606 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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.
EXAMPLE
16 is a term because A061447(16)=2207 is a prime. - Sean A. Irvine, Feb 15 2023
CROSSREFS
Sequence in context: A248350 A247512 A110095 * A369641 A169870 A261614
KEYWORD
nonn
AUTHOR
David Broadhurst, Jun 10 2001
EXTENSIONS
Definition corrected by T. D. Noe, Dec 14 2006
Missing a(5)=16 inserted by Sean A. Irvine, Feb 15 2023
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)