1,1
Table of n, a(n) for n=1..7.
a(1)=3 because 3*2^3-2*3^2+1=7 is prime, a(2)=5 because 5*4^5-4*5^4+1=2621 is prime.
(PARI) is(n)=ispseudoprime(n*(n-1)^n-(n-1)*n^(n-1)+1) \\ Charles R Greathouse IV, Jun 13 2017
Cf. A191699, A191715.
Sequence in context: A007516 A249759 A039584 * A136131 A143546 A069066
Adjacent sequences: A191714 A191715 A191716 * A191718 A191719 A191720
nonn,hard
Juri-Stepan Gerasimov, Jun 12 2011
approved
