A015625 Quadruples of different integers from [ 1,n ] with no common factors between triples.

0, 0, 0, 1, 5, 12, 31, 53, 99, 148, 257, 335, 531, 690, 948, 1192, 1685, 1977, 2689, 3171, 3961, 4651, 5987, 6716, 8353, 9539, 11340, 12781, 15599, 16945, 20417, 22705, 26066, 28814, 33405, 35980, 42059, 45966, 51636, 55816, 64226, 68205