A160044
Nonnegative integers x such that x^y+y^x is not prime for any integer y>1, y
0, 1, 2, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 23, 25, 26, 27, 28, 29, 30, 31, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 70, 71, 72, 73, 74, 77, 78, 79, 80, 82, 83, 84, 85, 86
Offset: 1
Keywords
Programs
-
PARI
for( i=0,999, for( j=2,i-1, is/*pseudo*/prime(i^j+j^i) && next(2)); print1(i", "))
Comments