A084389 a(n) = least positive k such that k^3 + A080761(n) is a square.
2, 1, 1, 3, 13, 1, 2, 7, 5, 3, 1, 2, 19, 1, 4, 3, 11, 6, 2, 5, 1, 3, 9, 2, 4, 1, 8, 14, 152, 5, 2, 45, 1, 10, 2, 3, 18, 7, 1, 5, 95, 4, 15, 13, 6, 9, 2, 3, 53, 1, 12, 17, 16, 5, 4, 2, 31, 7, 3, 1, 6, 21, 105, 23, 10, 2, 33, 5, 1, 3, 9, 14, 6, 7, 2, 11, 4, 1, 84, 19, 3, 5, 13, 12, 2, 741, 1, 4
Offset: 1