

A271718


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


1




OFFSET

1,1


COMMENTS

The corresponding primes are a subset of the generalized Woodall primes (A210340).


LINKS

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


EXAMPLE

14 is a member because 14*15^14  1 = 408700964355468749 is a prime number.


MATHEMATICA

Select[Range[10^3], PrimeQ[# (# + 1)^#  1] &] (* Michael De Vlieger, Apr 12 2016 *)


PROG

(PARI) for(n=1, 10^10, ispseudoprime(n*(n+1)^n1)&&print1(n, ", "))


CROSSREFS

Cf. A191568, A210340.
Sequence in context: A113182 A165433 A238728 * A222626 A006627 A077161
Adjacent sequences: A271715 A271716 A271717 * A271719 A271720 A271721


KEYWORD

nonn,hard,more


AUTHOR

Jeppe Stig Nielsen, Apr 12 2016


STATUS

approved



