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A153383
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Numbers n such that 12*n+1 is not prime.
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1
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0, 2, 4, 7, 10, 11, 12, 14, 17, 18, 21, 22, 24, 25, 27, 30, 32, 37, 39, 40, 41, 42, 43, 44, 46, 47, 49, 52, 53, 54, 57, 58, 60, 62, 65, 66, 67, 68, 70, 72, 74, 75, 76, 77, 79, 80, 81, 82, 87, 88, 90, 92, 95, 97, 98, 99, 102, 105, 106, 107, 109, 111, 112, 113, 114
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Complement of A110801 (12*n+1 is prime). [From Klaus Brockhaus, Jan 02 2009]
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FORMULA
| Let p=prime, n=(p^2-1)/12 mod (p);
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PROG
| (MAGMA) [ n: n in [0..120] | not IsPrime(12*n+1) ]; [From Klaus Brockhaus, Jan 02 2009]
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CROSSREFS
| Cf. A110801.
Sequence in context: A034702 A167206 A053223 * A177093 A164903 A057843
Adjacent sequences: A153380 A153381 A153382 * A153384 A153385 A153386
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KEYWORD
| nonn
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 25 2008
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EXTENSIONS
| More terms from Klaus Brockhaus, Jan 02 2009
0 added by Arkadiusz Wesolowski, Aug 03 2011
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