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A301638 Primes of the form 5^k + 5*k + 1. 1
2, 11, 48828181, 298023223876953251, 2910383045673370361328301, 258493941422821148397315216271863391739316284656524658203551 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term is too large to include.

The next term has 349 digits. - Harvey P. Dale, Dec 03 2018

LINKS

Table of n, a(n) for n=1..6.

FORMULA

a(n) = 5^A301635(n) + 5*A301635(n) + 1.

MATHEMATICA

Select[Table[5^n+5n+1, {n, 0, 550}], PrimeQ] (* Harvey P. Dale, Dec 03 2018 *)

CROSSREFS

Primes of the form b^k+b*k+1: A163115 (b=2), A180269 (b=3), this sequence (b=5).

Cf. A301635.

Sequence in context: A346144 A230229 A027736 * A309863 A110982 A079331

Adjacent sequences:  A301635 A301636 A301637 * A301639 A301640 A301641

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Mar 25 2018

STATUS

approved

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Last modified August 12 23:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)