A301644 - OEIS

A301644

Primes of form 3*k^k + 1.

13, 769, 139969, 30000000001

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OFFSET

1,1

COMMENTS

The next term is too large to include.

The next term (a(5)) has 703 digits. - Harvey P. Dale, Sep 04 2018

LINKS

FORMULA

a(n) = 3*(2*A160600(n))^(2*A160600(n)) + 1.

MATHEMATICA

Select[Table[3*k^k+1, {k, 500}], PrimeQ] (* Harvey P. Dale, Sep 04 2018 *)

CROSSREFS

Primes of form b*k^k + 1: A121270 (b=1), A216148 (b=2), this sequence (b=3), A301641 (b=4), A301642 (b=16).

KEYWORD

nonn

AUTHOR

STATUS

approved