A144236 Prime numbers of the form 7^k +- 6.

13, 43, 337, 349, 117643, 40353601, 33232930569607, 558545864083284001, 1341068619663964900801, 7730993719707444524137094401, 2651730845859653471779023381607, 256923577521058878088611477224235621321601, 4318114567396436564035293097707728087552248843

Offset: 1

Author

Reikku Kulon, Sep 15 2008

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..20

Crossrefs

Cf. A000040, A000668, A144231, A144232, A144233, A144234.

Programs

Mathematica

Select[Flatten[Table[7^k+{6,-6},{k,40}]],PrimeQ]//Sort (* Harvey P. Dale, Jul 07 2021 *)

Extensions

a(12)-a(13) from Amiram Eldar, Jul 23 2025