login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064255 Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,37. 1
498, 1608, 9156, 21588, 24696, 26250, 27360, 42456, 50670, 93738, 95736, 111720, 119046, 121266, 145020, 149238, 150570, 153456, 158340, 173658, 174990, 198300, 209178, 211176, 290208, 305748, 317070, 317958, 329058, 332610, 342378, 351258, 362580, 398988, 420966 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1).
REFERENCES
Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27 2001.
LINKS
MATHEMATICA
carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 37}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* Amiram Eldar, Oct 17 2019 *)
CROSSREFS
Cf. A087788.
Sequence in context: A145922 A145981 A210785 * A067917 A093249 A235753
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 23 2001
EXTENSIONS
Offset corrected and more terms added by Amiram Eldar, Oct 17 2019
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 20 21:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)