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A138645
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Primes p such that 7*p+2 is composite.
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0
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2, 7, 13, 17, 19, 29, 31, 37, 41, 43, 59, 61, 67, 73, 79, 83, 89, 97, 103, 109, 113, 127, 137, 139, 149, 151, 157, 163, 179, 181, 191, 193, 199, 211, 223, 227, 229, 233, 239, 241, 263, 269, 271, 277, 281, 283, 307, 313, 331, 337, 347, 349, 359, 367, 373, 379
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..56.
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EXAMPLE
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7*2+2=16, 7*7+2=51, 7*13+2=93,...
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MATHEMATICA
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a={}; Do[p=Prime[n]; If[ !PrimeQ[7*p+2], AppendTo[a, p]], {n, 8^2}]; a
Select[Prime[Range[200]], !PrimeQ[7#+2]&] (* From Harvey P. Dale, Aug 05 2011 *)
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CROSSREFS
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Cf. A153351.
Sequence in context: A154313 A196012 A065104 * A191060 A166246 A063206
Adjacent sequences: A138642 A138643 A138644 * A138646 A138647 A138648
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, May 15 2008
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EXTENSIONS
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More terms from Vincenzo Librandi, Apr 01 2010
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STATUS
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approved
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