

A181681


Primes of the form n^(n+1)+(n1)^n.


1




OFFSET

1,1


COMMENTS

The next term of the sequence is a(5)=393^394+392^393 = 15526396580196065…8500849703002799761, which has 1023 decimal digits and is too large to include here.


LINKS

Table of n, a(n) for n=1..4.


EXAMPLE

For n=5, 16649 is in the sequence because 5^6+4^5=16649 is prime.


MATHEMATICA

lst={}; Do[m=n+1; q=n^m+ (n1)^n; If[PrimeQ[q], AppendTo[lst, q]], {n, 0, 400}];
lst


PROG

(PARI) A181681(istrt)={for(n=istrt, istrt+400,
if(isprime(n^(n+1)+(n1)^n), print(n^(n+1)+(n1)^n))); }


CROSSREFS

Sequence in context: A086695 A056568 A174758 * A167398 A023330 A059766
Adjacent sequences: A181678 A181679 A181680 * A181682 A181683 A181684


KEYWORD

nonn


AUTHOR

Michel Lagneau, Nov 17 2010


STATUS

approved



