A023232 Primes p such that 8*p + 9 is also prime.

11, 13, 23, 29, 31, 41, 43, 53, 71, 73, 79, 83, 109, 149, 151, 193, 199, 211, 233, 251, 263, 269, 283, 331, 349, 353, 379, 389, 401, 419, 431, 461, 499, 521, 541, 563, 569, 599, 601, 643, 653, 659, 661, 673, 743, 809, 821, 853, 881, 911, 941, 983, 991, 1009, 1019, 1033

Offset: 1

Author

David W. Wilson

Keywords

• nonn
• easy

Links

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

Programs

Magma

[n: n in PrimesUpTo(1100) | IsPrime(8*n+9)]; // Vincenzo Librandi, Nov 20 2010

Mathematica

Select[Prime[Range[300]],PrimeQ[8#+9]&]  (* Harvey P. Dale, Jan 26 2011 *)