A309422 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A309422

Numbers k such that 7^k + k^7 is prime.

1

54, 3076, 11796

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

a(4) > 110000.

LINKS

Table of n, a(n) for n=1..3.

CROSSREFS

Cf. A001596, A114974, A309421.

Sequence in context: A189200 A042405 A187304 * A212705 A046199 A245831

Adjacent sequences: A309419 A309420 A309421 * A309423 A309424 A309425

KEYWORD

nonn,bref,more,hard

AUTHOR

Hugo Pfoertner, Jul 30 2019

STATUS

approved