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A023201
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Numbers n such that n and n + 6 both prime.
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65
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5, 7, 11, 13, 17, 23, 31, 37, 41, 47, 53, 61, 67, 73, 83, 97, 101, 103, 107, 131, 151, 157, 167, 173, 191, 193, 223, 227, 233, 251, 257, 263, 271, 277, 307, 311, 331, 347, 353, 367, 373, 383, 433, 443, 457, 461, 503, 541, 557, 563, 571, 587, 593, 601, 607, 613, 641, 647
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Sexy Primes.
Eric Weisstein's World of Mathematics, Twin Primes
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MATHEMATICA
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Select[Range[10^2], PrimeQ[ # ]&&PrimeQ[ #+6] &] (from Vladimir Joseph Stephan Orlovsky, Apr 29 2008)
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PROG
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(MAGMA) [n: n in [0..40000] | IsPrime(n) and IsPrime(n+6)] [From Vincenzo Librandi, Aug 04 2010]
(Haskell)
a023201 n = a023201_list !! (n-1)
a023201_list = filter ((== 1) . a010051 . (+ 6)) a000040_list
-- Reinhard Zumkeller, Feb 25 2013
(PARI) is(n)=isprime(n+6)&&isprime(n) \\ Charles R Greathouse IV, Mar 20 2013
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CROSSREFS
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A031924 and A007529 together give A023201.
Cf. A046117, A098428, A000040, A010051, A006489 (subsequence).
Sequence in context: A180951 A040146 A015914 * A106059 A102386 A038958
Adjacent sequences: A023198 A023199 A023200 * A023202 A023203 A023204
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KEYWORD
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nonn,easy
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AUTHOR
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David W. Wilson
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STATUS
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approved
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