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A061445 Composite numbers n such that primitive part of Lucas(n) (see A061447) is prime. 6
9, 10, 14, 15, 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

David Broadhurst, Table of n, a(n) for n=1..257 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.

C. K. Caldwell, Lucas Aurifeuillian primitive part

CROSSREFS

Cf. A061446, A061447, A061254, A061442, A061443.

Sequence in context: A247512 A110095 A169870 * A261614 A088710 A020199

Adjacent sequences:  A061442 A061443 A061444 * A061446 A061447 A061448

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 July 23 19:17 EDT 2021. Contains 346259 sequences. (Running on oeis4.)