

A084914


Numbers k such that k^k*k!  1 is prime.


1




OFFSET

1,1


COMMENTS

a(1)a(8) have been proved to correspond to primes. No other terms less than 10000.  Robert Price, May 19 2012


LINKS

Table of n, a(n) for n=1..8.


EXAMPLE

4 is in the sequence because 4!*4^4  1 = 6143 is prime.


MATHEMATICA

Do[If[PrimeQ[n^n*n!1], Print[n]], {n, 700}]


CROSSREFS

Cf. A002981, A002982.
Sequence in context: A232173 A067195 A080230 * A058779 A230777 A241542
Adjacent sequences: A084911 A084912 A084913 * A084915 A084916 A084917


KEYWORD

more,hard,nonn


AUTHOR

Farideh Firoozbakht, Jul 14 2003


EXTENSIONS

a(8) = 3243 from Robert Price, May 19 2012


STATUS

approved



