A074310 Digital sum of n = sum of palindromes from the smallest prime factor of n to the largest prime factor of n.

2, 3, 5, 7, 75, 209, 589, 2401, 7429, 7938, 8671, 15876, 20480, 24696, 36288, 39690, 47628, 48384, 49392, 55566, 56448, 60401, 68107, 72576, 74088, 78750, 79380, 81648, 83317, 84672, 86436, 89401, 91854, 95256, 108864, 112896, 129654, 142884