A301642 Primes of form 16*k^k + 1.

17, 433, 746497, 142657607172097

Offset: 1

Author

Seiichi Manyama, Mar 25 2018

Keywords

• nonn

Comments

The next term is too large to include.

The next term a(5) has 108 digits; a(6) has 166 digits; a(7) has 170 digits. - Harvey P. Dale, Aug 23 2019

Crossrefs

Primes of form b*k^k + 1: A121270 (b=1), A216148 (b=2), A301644 (b=3), A301641 (b=4), this sequence (b=16).

Cf. A301522.

Programs

Mathematica

Select[Table[16*k^k+1,{k,20}],PrimeQ] (* Harvey P. Dale, Aug 23 2019 *)

Formula

a(n) = 16*A301522(n+1)^A301522(n+1) + 1.