A291860 Prime numbers of the form 7^k - 8.

41, 2393, 5764793, 282475241, 1798465042647412146620280340569649349251241, 380532926880843152923706465386871407580539099147930273794471851842901108534824949331057641

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..7

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 - 8], {k, 2, 100}], PrimeQ[#] &]

Crossrefs

Cf. A217131.

Sequence in context: A233095 A223384 A211907 * A193124 A223004 A275093

Adjacent sequences: A291857 A291858 A291859 * A291861 A291862 A291863

Keyword

nonn

Author

Robert Price, Sep 04 2017

Status

approved