A224468 Primes of the form 7^n - n.

47, 117643, 5764793, 13841287189, 15286700631942576193765185769276826357, 36703368217294125441230211032033660188753

Offset

1,1

Comments

The next term is too big to display. Corresponding n are given in A224470.

Links

Table of n, a(n) for n=1..6.

Mathematica

Select[Table[7^k - k, {k, 2, 1000, 2}], PrimeQ] (* Bruno Berselli, Apr 07 2013 *)

Crossrefs

Cf. A081296, A224420, A224451, A024076, A224470.

Sequence in context: A210818 A093940 A237512 * A353697 A328364 A087533

Adjacent sequences: A224465 A224466 A224467 * A224469 A224470 A224471

Keyword

nonn

Author

Alex Ratushnyak, Apr 06 2013

Status

approved