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A301641 Primes of form 4*k^k + 1. 5
5, 17, 109, 3294173, 355271367880050092935562133789062501 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

FORMULA

a(n) = 4*A301519(n+1)^A301519(n+1) + 1.

MAPLE

a:=k->`if`(isprime(4*k^k+1), 4*k^k+1, NULL): seq(a(k), k=1..1400); # Muniru A Asiru, Mar 25 2018

CROSSREFS

Primes of form b*k^k + 1: A121270 (b=1), A216148 (b=2), A301644 (b=3), this sequence (b=4), A301642 (b=16).

Cf. A301519, A301808.

Sequence in context: A267143 A234797 A062586 * A067710 A197912 A203114

Adjacent sequences:  A301638 A301639 A301640 * A301642 A301643 A301644

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Mar 25 2018

STATUS

approved

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Last modified March 18 17:51 EDT 2019. Contains 321292 sequences. (Running on oeis4.)