A308888 Positions of 3's on the spiral defined in A308884.
17, 18, 22, 26, 27, 28, 32, 33, 38, 39, 45, 46, 52, 59, 60, 76, 101, 108, 118, 124, 128, 130, 146, 153, 158, 159, 160, 166, 172, 174, 176, 184, 185, 186, 188, 189, 191, 192, 193, 199, 206, 218, 236, 286, 292, 296, 298, 302, 326, 332, 333, 339, 344, 345, 350, 358, 364, 370, 372, 382, 383, 389, 390, 396, 397
Offset: 1