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 A049438 p, p+6 and p+8 are all primes (A046138) but p+2 is not. 9
 23, 53, 131, 173, 233, 263, 563, 593, 653, 1013, 1223, 1283, 1601, 1613, 2333, 2543, 2963, 3323, 3533, 3761, 3911, 3923, 4013, 4211, 4253, 4643, 4793, 5003, 5273, 5471, 5843, 5861, 6263, 6353, 6563, 6653, 6863, 7121, 7451, 7481, 7541, 7583 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. J. Mathar, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Prime@ Range[10^3], MatchQ[Boole@ PrimeQ@ {# + 2, # + 6, # + 8}, {0, 1, 1}] &] (* Michael De Vlieger, Feb 05 2017 *) PROG (PARI) isok(p) = isprime(p) && !isprime(p+2) && isprime(p+6) && isprime(p+8); \\ Michel Marcus, Dec 13 2013 CROSSREFS Subsequence of A031924. - R. J. Mathar, Jun 15 2013 Cf. A007530, A023202, A031926, A046134, A046138, A049436, A049437. Sequence in context: A132235 A277993 A051650 * A078854 A078959 A238854 Adjacent sequences:  A049435 A049436 A049437 * A049439 A049440 A049441 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified November 29 04:03 EST 2020. Contains 338756 sequences. (Running on oeis4.)