A015791 k is the first integer such that phi(k) + n | sigma(k + n):.

1, 1, 1, 7, 6, 5, 9, 3, 2, 1, 4, 50, 15, 156, 8, 60, 6, 80, 6, 15, 10, 126, 16, 49, 14, 33, 12, 109, 26, 60, 72, 51, 24, 103, 74, 10, 26, 69, 54, 97, 4, 200, 33, 9, 58, 105, 34, 89, 30, 144, 66, 175, 8, 83, 6, 123, 82, 15, 120, 1682, 42, 135, 58, 73, 30, 71, 10