A224451 Primes of the form 4^n - n.

3, 61, 1019, 1180591620717411303389, 1569275433846670190958947355801916604025588861116008628129

Offset

1,1

Comments

Corresponding n are given in A057908.

The next term has 797 digits. - Harvey P. Dale, Mar 16 2015

Links

Table of n, a(n) for n=1..5.

Mathematica

Select[Table[4^n-n, {n, 200}], PrimeQ] (* Harvey P. Dale, Mar 16 2015 *)

Crossrefs

Cf. A057908 (n such that 4^n - n is prime).

Cf. A024037, A129963, A224420.

Sequence in context: A120308 A279381 A186205 * A239792 A009476 A292110

Adjacent sequences: A224448 A224449 A224450 * A224452 A224453 A224454

Keyword

nonn

Author

Alex Ratushnyak, Apr 06 2013

Status

approved