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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.)