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A064238
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Values of m such that N=(am+1)(bm+1)(cm+1) is a Carmichael number, where a,b,c = 1,2,3.
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11
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6, 36, 210, 270, 306, 330, 336, 600, 726, 1170, 1236, 1296, 1530, 1656, 2220, 2280, 2556, 3036, 3060, 3066, 4260, 4446, 4800, 4950, 5226, 5580, 5850, 6150, 6360, 6690, 6840, 6966, 7620, 7680, 7686, 7866, 8016, 8166, 8190, 8286, 8520
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1)
All m's are multiples of 6 and m, 2m and 3m divide
m(2m+1)(3m+1)-1 automatically.
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REFERENCES
| Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27, 2001.
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FORMULA
| a(n) = 6 * A046025(n+1).
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CROSSREFS
| A046025
Sequence in context: A038157 A006812 A111989 * A014336 A027910 A075848
Adjacent sequences: A064235 A064236 A064237 * A064239 A064240 A064241
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Sep 23 2001
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