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A187605 Primes of the form k^k + k - 1. 7
5, 29, 1978419655660313589123997, 205891132094649000000000000000000000000000029 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See A058912 for numbers k such that k^k + k - 1 is prime. Subsequence of A231712 (numbers n^n + n - 1). - Jaroslav Krizek, Nov 13 2013
The next prime has 1460 digits. - Jinyuan Wang, Mar 01 2020
LINKS
Aldo Roberto Pessolano, Table of n, a(n) for n = 1..6
MATHEMATICA
Do[p=n^n+n-1; If[PrimeQ[p], Print[p]], {n, 100}]
PROG
(PARI) lista(nn) = for(k=1, nn, if(ispseudoprime(q=k^k+k-1), print1(q, ", "))); \\ Jinyuan Wang, Mar 01 2020
CROSSREFS
Sequence in context: A228028 A237256 A172041 * A266569 A098346 A134166
KEYWORD
nonn
AUTHOR
Marco Ripà, Mar 11 2011
STATUS
approved

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Last modified July 20 09:46 EDT 2024. Contains 374445 sequences. (Running on oeis4.)