

A085602


Numbers of the form (2n+1)^(2n+1) + 1.


1




OFFSET

1,1


COMMENTS

These numbers cannot be a perfect square. Moreover, x^x + 1 <> k^x for if it were, we would have a a counterexample to Fermat's Last Theorem.


LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..193


FORMULA

Also even Sierpinski numbers of the first kind.


MATHEMATICA

#^#+1&/@Range[1, 21, 2] (* Harvey P. Dale, Dec 08 2012 *)


PROG

(PARI) forstep(x=1, 20, 2, print1(x^x+1" "))


CROSSREFS

Cf. A014566.
Sequence in context: A230700 A168554 A152792 * A058502 A080266 A308757
Adjacent sequences: A085599 A085600 A085601 * A085603 A085604 A085605


KEYWORD

easy,nonn


AUTHOR

Cino Hilliard, Jul 07 2003


STATUS

approved



