|
%I #5 Sep 25 2023 09:07:04
%S 3,6,128,1298,375534
%N a(n) is the least integer that can be expressed as the sum of a prime number and the n-th power of a positive integer in exactly n ways, or -1 if no such integer exists.
%e For n = 3: 128 = 3 + 5^3 = 101 + 3^3 = 127 + 1^3.
%Y Cf. A064283, A365290, A365292, A365504.
%K nonn,more
%O 1,1
%A _Ilya Gutkovskiy_, Sep 07 2023
|
