A078375 Smallest prime factor of numbers which can be written as sum of a positive square and a positive cube.

2, 5, 3, 2, 2, 17, 2, 2, 2, 31, 3, 2, 37, 43, 2, 2, 2, 3, 3, 5, 2, 2, 73, 2, 2, 2, 89, 7, 2, 101, 2, 113, 2, 2, 127, 2, 3, 2, 3, 5, 2, 2, 2, 7, 2, 2, 3, 2, 3, 5, 3, 2, 197, 2, 2, 2, 7, 2, 223, 3, 2, 2, 233, 241, 2, 2, 257, 2, 2, 5, 269, 2, 283, 17, 2, 2, 3, 2, 2, 3, 5, 2, 337, 2, 347, 2, 3, 2