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A084853 Numbers k such that k^(k+1) + (k+1)^k + k(k+1) is prime. 0
1, 2, 3, 4, 5, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(7) > 10600. - Michael S. Branicky, Mar 21 2023
LINKS
MATHEMATICA
Do[If[PrimeQ[n^(n+1)+(n+1)^n+n(n+1)], Print[n]], {n, 0, 1000}]
Select[Range[30], PrimeQ[#^(#+1)+(#+1)^#+#(#+1)]&] (* Harvey P. Dale, May 28 2016 *)
PROG
(PARI) is(n)=ispseudoprime(n^(n+1)+(n+1)^n+n*(n+1)) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A075807 A124232 A051143 * A115337 A114333 A265098
KEYWORD
more,nonn
AUTHOR
Farideh Firoozbakht, Jul 13 2003
STATUS
approved

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Last modified March 19 07:19 EDT 2024. Contains 370954 sequences. (Running on oeis4.)