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A023227 Primes p such that 7*p + 10 is also prime. 1
3, 7, 13, 31, 37, 43, 67, 73, 79, 109, 139, 157, 163, 181, 193, 211, 223, 229, 241, 271, 277, 367, 373, 379, 397, 421, 433, 439, 457, 463, 523, 541, 571, 577, 601, 607, 661, 673, 709, 727, 757, 769, 787, 829, 853, 907, 937, 967, 991, 1039, 1063, 1117, 1153, 1213 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Prime@Range@500, PrimeQ[7 # + 10] &] (* Vincenzo Librandi, May 19 2014 *)

PROG

(MAGMA) [n: n in [0..1000] | IsPrime(n) and IsPrime(7*n+10)]; // Vincenzo Librandi, Nov 20 2010

CROSSREFS

Sequence in context: A330835 A249378 A136060 * A031157 A049488 A136051

Adjacent sequences:  A023224 A023225 A023226 * A023228 A023229 A023230

KEYWORD

nonn,easy

AUTHOR

David W. Wilson

STATUS

approved

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Last modified July 23 19:17 EDT 2021. Contains 346259 sequences. (Running on oeis4.)