A084852 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A084852

Numbers k such that k^(k+1) + (k+1)^k - k(k+1) is prime.

1

2, 5, 6, 7, 8, 9, 14, 37, 81, 143, 302

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

a(12) > 15000. - Michael S. Branicky, Aug 09 2024

LINKS

Table of n, a(n) for n=1..11.

MATHEMATICA

Do[If[PrimeQ[n^(n+1)+(n+1)^n-n(n+1)], Print[n]], {n, 1000}]

PROG

(PARI) is(n)=ispseudoprime(n^(n+1)+(n+1)^n-n*(n+1)) \\ Charles R Greathouse IV, Jun 12 2017

CROSSREFS

Cf. A072179, A073499.

Sequence in context: A039044 A212441 A182783 * A288659 A228374 A092206

Adjacent sequences: A084849 A084850 A084851 * A084853 A084854 A084855

KEYWORD

more,nonn

AUTHOR

Farideh Firoozbakht, Jul 13 2003

STATUS

approved