A302089 - OEIS

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A302089

Primes of form 5*k^k + 4.

2

139, 15629, 1937102449

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The next term is too large to include.

LINKS

Table of n, a(n) for n=1..3.

FORMULA

a(n) = 5*A302088(n)^A302088(n) + 4.

PROG

(PARI) lista(nn) = forstep(n=1, nn, 2, if(ispseudoprime(p=5*n^n+4), print1(p, ", "))); \\ Altug Alkan, Apr 01 2018

CROSSREFS

Primes of form b*k^k + b - 1: A216148 (b=2), A301811 (b=3), A301808 (b=4), this sequence (b=5), A302091 (b=6).

Sequence in context: A158527 A201174 A281249 * A188452 A183491 A215571

Adjacent sequences: A302086 A302087 A302088 * A302090 A302091 A302092

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Apr 01 2018

STATUS

approved