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A138644
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Primes p such that 5*p+2 is composite.
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0
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2, 5, 11, 17, 23, 29, 37, 41, 43, 47, 53, 59, 71, 83, 89, 101, 103, 107, 113, 127, 131, 137, 139, 149, 163, 167, 173, 179, 191, 197, 211, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 317, 337, 347, 353, 359, 367, 379, 383, 389
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 5*2+2=12, 5*5+2=27, 5*11+2=57,...
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MATHEMATICA
| a={}; Do[p=Prime[n]; If[ !PrimeQ[5*p+2], AppendTo[a, p]], {n, 8^2}]; a
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CROSSREFS
| Sequence in context: A140559 A067775 A140552 * A164921 A156830 A140556
Adjacent sequences: A138641 A138642 A138643 * A138645 A138646 A138647
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KEYWORD
| nonn
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AUTHOR
| Vladimir Orlovsky (4vladimir(AT)gmail.com), May 15 2008
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EXTENSIONS
| More terms from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Apr 01 2010
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