A354818 Positions of even terms in A346241.
15, 18, 21, 27, 33, 35, 39, 45, 50, 51, 54, 55, 57, 60, 63, 65, 69, 72, 75, 77, 84, 85, 87, 90, 91, 93, 95, 98, 99, 108, 111, 115, 117, 119, 123, 125, 126, 129, 132, 133, 135, 140, 141, 143, 145, 147, 150, 153, 155, 156, 159, 161, 171, 175, 177, 180, 183, 185, 187, 189, 198, 200, 201, 203, 204, 205, 207, 209, 213
Offset: 1