A380140 Numbers of the form 4*j*k - j - k for j, k >= 2.
12, 19, 26, 30, 33, 40, 41, 47, 52, 54, 56, 61, 63, 68, 71, 74, 75, 82, 85, 86, 89, 90, 96, 101, 103, 107, 109, 110, 116, 117, 118, 124, 128, 129, 131, 132, 138, 140, 145, 146, 147, 151, 152, 155, 159, 161, 162, 166, 173, 176, 178, 180, 182, 184, 185, 187, 191, 194, 195, 201
Offset: 1