A116009 Numbers n such that n + sigma(n) + phi(n) is a square.

3, 81, 400, 972, 1209, 1276, 1480, 1833, 2700, 3408, 4080, 4345, 6321, 6498, 6885, 8673, 8697, 10257, 12325, 13192, 13240, 13409, 14496, 14560, 16932, 17232, 18168, 18904, 19140, 19344, 20196, 22896, 23568, 23920, 27001, 27313, 28305