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A187605

Primes of the form k^k + k - 1.

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	`Table of n, a(n) for n = 1..4` `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	`Cf. A058912, A231712, A268987.` `Sequence in context: A228028 A237256 A172041 * A266569 A098346 A134166` `Adjacent sequences: A187602 A187603 A187604 * A187606 A187607 A187608`
	KEYWORD	`nonn`
	AUTHOR	`Marco Ripà, Mar 11 2011`
	STATUS	`approved`

Last modified August 6 12:02 EDT 2024. Contains 374974 sequences. (Running on oeis4.)