A291861 Prime numbers of the form 7^k - 6.

43, 337, 117643, 40353601, 558545864083284001, 1341068619663964900801, 7730993719707444524137094401, 256923577521058878088611477224235621321601, 4318114567396436564035293097707728087552248843

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..10

F. Firoozbakht, M. F. Hasler, Variations on Euclid's formula for Perfect Numbers, JIS 13 (2010) #10.3.1.

Henri & Renaud Lifchitz, PRP Records

OpenPFGW Project, Primality Tester

Mathematica

Select[Table[7^k - 6], {k, 1, 100}], PrimeQ[#] &]

Crossrefs

Cf. A191469.

Sequence in context: A217621 A213554 A164783 * A142502 A272124 A340199

Adjacent sequences: A291858 A291859 A291860 * A291862 A291863 A291864

Keyword

nonn

Author

Robert Price, Sep 04 2017

Status

approved