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A134797 Odd isolated primes. 4
23, 37, 47, 53, 67, 79, 83, 89, 97, 113, 127, 131, 157, 163, 167, 173, 211, 223, 233, 251, 257, 263, 277, 293, 307, 317, 331, 337, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 439, 443, 449, 457, 467, 479, 487, 491, 499, 503, 509, 541, 547, 557, 563, 577 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A007510(n+1).
a(n) ~ n log n. - Charles R Greathouse IV, Jun 07 2013
MATHEMATICA
Flatten[Select[Split[Prime[Range[106]], #2 - #1 < 4 &], Length[#] == 1 &]] (* Jayanta Basu, Jun 07 2013 *)
PROG
(PARI) select(p->!isprime(p-2)&&!isprime(p+2), primes(100)[2..100]) \\ Charles R Greathouse IV, Jun 07 2013
CROSSREFS
Sequence in context: A290767 A173829 A110673 * A209617 A179780 A153740
KEYWORD
easy,nonn,less
AUTHOR
Omar E. Pol, Nov 14 2007
STATUS
approved

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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)