A061445 Composite numbers n such that primitive part of Lucas(n) (see A061447) is prime.

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

Offset

1,1

Links

David Broadhurst, Table of n, a(n) for n = 1..258 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

Example

16 is a term because A061447(16)=2207 is a prime. - Sean A. Irvine, Feb 15 2023

Crossrefs

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

Sequence in context: A248350 A247512 A110095 * A369641 A169870 A261614

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

Missing a(5)=16 inserted by Sean A. Irvine, Feb 15 2023

Status

approved