A224451 Primes of the form 4^n - n.

3, 61, 1019, 1180591620717411303389, 1569275433846670190958947355801916604025588861116008628129

Offset: 1

Author

Alex Ratushnyak, Apr 06 2013

Keywords

• nonn

Comments

Corresponding n are given in A057908.

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

Crossrefs

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

Cf. A024037, A129963, A224420.

Programs

Mathematica

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