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A054775
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Positive multiples of 6 which are not the midpoint of a pair of twin primes.
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0
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24, 36, 48, 54, 66, 78, 84, 90, 96, 114, 120, 126, 132, 144, 156, 162, 168, 174, 186, 204, 210, 216, 222, 234, 246, 252, 258, 264, 276, 288, 294, 300, 306, 318, 324, 330, 336, 342, 354, 360, 366, 372, 378, 384, 390, 396, 402, 408, 414, 426, 438, 444, 450, 456, 468, 474
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OFFSET
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1,1
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LINKS
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PROG
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(Magma) [ n: n in [6..600 by 6] | not IsPrime(n-1) or not IsPrime(n+1) ]; // Klaus Brockhaus, Aug 18 2010
(PARI) forstep(n=6, 600, 6, if(!(isprime(n-1)&&isprime(n+1)), print1(n, ", "))) \\ Klaus Brockhaus, Aug 18 2010
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CROSSREFS
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Cf. A067611 (sequence divided by 6).
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KEYWORD
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nonn
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AUTHOR
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Stuart M. Ellerstein (ellerstein(AT)aol.com), May 19 2000
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EXTENSIONS
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STATUS
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approved
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