|
%I #15 Apr 23 2018 21:12:36
%S 2,3,2,0,2,175,16,3,2,539,32,221,118,417,2,85,14,133,22,81,76,115,12,
%T 55,28,15,0,2465,110,31,232,117,230,3,12,851,4,375,2,1599,48,5461,46,
%U 15,218,6815,78,7,100,993,28,901,624,13,252,183,226,43247,104,5063,1348,777,1294,0,1806
%N Least k>1 such that k^n + n is prime, 0 if no such k exists.
%C The values of n for which k^n + n is reducible over the integers are given in A097792. - _Joseph Myers_, _Allan C. Wechsler_ Apr 16 2018
%H Hugo Pfoertner, <a href="/A303121/b303121.txt">Table of n, a(n) for n = 1..365</a>
%F If n + 1 is composite, then a(n) = A072883(n). - _Altug Alkan_, Apr 23 2018
%e a(2) = 3 because 3^2 + 3 = A303122(2) = 11 is prime, whereas 2^2 + 2 = 6 is composite.
%Y Cf. A072883, A093324, A097764, A097792, A303122.
%K nonn
%O 1,1
%A _Hugo Pfoertner_, Apr 23 2018
|
