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A065703 Values of m such that N = (m+1)(2m+1)(71m+1) is a 3-Carmichael number (A087788). 10
1170, 5430, 53568, 59106, 63366, 86370, 95316, 99576, 103836, 105966, 116190, 183498, 184776, 239730, 260178, 300648, 319818, 333450, 339840, 362418, 367530, 481698, 485958, 503850, 511518, 605238, 644856, 725370, 732186, 762006, 788418, 799920, 837408, 870210 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

am+1, bm+1, cm+1 are primes and am|(N-1), bm|(N-1), cm|(N-1).

MATHEMATICA

CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 1000000, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[71# + 1] && CarmichaelNbrQ[(# + 1)(2# + 1)(71# + 1)] &] (* Robert G. Wilson v, Aug 23 2012 *)

PROG

(PARI) for(m=1, 1e6, is_A002997((m+1)*(2*m+1)*(71*m+1)) & print1(m", "))  \\ - M. F. Hasler, Aug 23 2012

CROSSREFS

Cf. A064238-A064262, A065695, A065696, A065697, A065698, A065699, A065700, A065701, A065702, A087788.

Sequence in context: A209825 A264688 A043432 * A202487 A230946 A225234

Adjacent sequences:  A065700 A065701 A065702 * A065704 A065705 A065706

KEYWORD

nonn

AUTHOR

Harvey Dubner (harvey(AT)dubner.com), Nov 14 2001

EXTENSIONS

Definition simplified, missing terms inserted, and extended by M. F. Hasler, Aug 23 2012

More terms from Amiram Eldar, Oct 17 2019

STATUS

approved

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Last modified September 21 05:55 EDT 2020. Contains 337267 sequences. (Running on oeis4.)