A243587 Primes p such that sum of digits + 7 is prime.

13, 19, 31, 37, 73, 79, 97, 103, 109, 127, 163, 181, 211, 271, 277, 307, 349, 367, 433, 439, 457, 499, 523, 541, 547, 613, 619, 631, 673, 691, 709, 727, 769, 787, 811, 853, 859, 877, 907, 967, 1009, 1021, 1063, 1069, 1087, 1117, 1153, 1171, 1201, 1249, 1399

Offset: 1

Author

Vincenzo Librandi, Jun 07 2014

Keywords

• nonn
• base
• less

Links

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

Crossrefs

Cf. similar sequences listed in A243586.

Programs

Magma

[p: p in PrimesUpTo(1500) | IsPrime(q) where q is 7+(&+Intseq(p))];

Mathematica

Select[ Prime[Range[600]], PrimeQ[Plus@@IntegerDigits[#] + 7] &]