A015639 Number of ordered quadruples of integers from [ 2,n ] with no common factors between triples.

0, 1, 3, 14, 20, 56, 86, 148, 198, 360, 438, 713, 884, 1157, 1433, 2069, 2365, 3262, 3766, 4604, 5331, 6944, 7684, 9527, 10777, 12737, 14229, 17502, 18812, 22809, 25255, 28782, 31654, 36484, 39078, 45912, 49983, 55894, 60145, 69494