A072179 Numbers n such that n^(n+1) - (n+1)^n is prime.

3, 6, 9, 12, 44, 883, 1277

Offset

1,1

Comments

Some of the larger entries may only correspond to probable primes.

6279 is a term. - Alexander Adamchuk, Apr 09 2007

Links

Table of n, a(n) for n=1..7.

Mathematica

Do[ If[ PrimeQ[ n^(n + 1) - (n + 1)^n], Print[n]], {n, 1, 2000}]

Prog

(PARI) is(n)=ispseudoprime(n^(n+1)-(n+1)^n) \\ Charles R Greathouse IV, Feb 17 2017

Crossrefs

Cf. A072164, A073499.

Sequence in context: A277250 A083491 A086423 * A065811 A061514 A078559

Adjacent sequences: A072176 A072177 A072178 * A072180 A072181 A072182

Keyword

nonn

Author

Daniel Gronau (Daniel.Gronau(AT)gmx.de), Jun 30 2002

Extensions

Edited and extended by Robert G. Wilson v, Jul 02 2002

Status

approved