A068238 Denominators of arithmetic derivative of 1/n: -A003415(n)/n^2; numerators: A068237.

1, 4, 9, 4, 25, 36, 49, 16, 27, 100, 121, 9, 169, 196, 225, 8, 289, 108, 361, 50, 441, 484, 529, 144, 125, 676, 27, 49, 841, 900, 961, 64, 1089, 1156, 1225, 108, 1369, 1444, 1521, 400, 1681, 1764, 1849, 121, 675, 2116, 2209