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A161471 Primes of the form k^k + k + 1. 4
2, 3, 7, 31, 46663, 387420499 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The associated k are in A058911. - R. J. Mathar, Jun 12 2009

a(7) = 116035988662615798148247830...0301775295923724561430603629007 (1232 digits).

LINKS

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

FORMULA

Intersection of A000040 and A066279. - R. J. Mathar, Jun 12 2009

MATHEMATICA

Unprotect[Power]; Power[0, 0] = 1; Protect[Power]; lst={}; Do[p=n^n+n+1; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 100}]; lst

PROG

(PARI) lista(nn) = for(k=0, nn, if(ispseudoprime(q=k^k+k+1), print1(q, ", "))); \\ Jinyuan Wang, Mar 01 2020

CROSSREFS

Cf. A058911, A066279, A187605.

Sequence in context: A018239 A066279 A337221 * A057677 A032148 A101484

Adjacent sequences:  A161468 A161469 A161470 * A161472 A161473 A161474

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jun 10 2009

EXTENSIONS

Definition simplified by R. J. Mathar, Jun 12 2009

STATUS

approved

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Last modified January 20 18:38 EST 2022. Contains 350472 sequences. (Running on oeis4.)