The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A187605 Primes of the form k^k + k - 1. 4
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 23 21:51 EST 2020. Contains 338603 sequences. (Running on oeis4.)