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A153039
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Numbers n such that 2*n-7 is not prime.
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4
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8, 11, 14, 16, 17, 20, 21, 23, 26, 28, 29, 31, 32, 35, 36, 38, 41, 42, 44, 46, 47, 49, 50, 51, 53, 56, 59, 61, 62, 63, 64, 65, 66, 68, 70, 71, 74, 75, 76, 77, 80, 81, 83, 84, 86, 88, 89, 91, 92, 95, 96, 97, 98, 101, 104, 105, 106, 107, 108, 110, 111, 112
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Two more than the associated value in A153043, one more than in A153040.
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MATHEMATICA
| Select[Range[8, 200], !PrimeQ[2*#-7]&] (* From Vladimir Joseph Stephan Orlovsky, Feb 09 2012 *)
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PROG
| (MAGMA) [n: n in [5..220]| not IsPrime(2*n-7)]
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CROSSREFS
| Complement of A089192, A153040.
Sequence in context: A122195 A064153 A106670 * A190208 A061570 A096679
Adjacent sequences: A153036 A153037 A153038 * A153040 A153041 A153042
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KEYWORD
| nonn,changed
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 17 2008
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EXTENSIONS
| Partially edited by N. J. A. Sloane, Jun 23 2010
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