A037002 Positions of the digit '3' in the decimal expansion of Pi.

9, 15, 17, 24, 25, 27, 43, 46, 64, 86, 91, 111, 115, 123, 137, 142, 170, 194, 196, 215, 216, 230, 231, 237, 261, 265, 274, 282, 283, 285, 300, 313, 346, 349, 358, 364, 365, 368, 382, 401, 402, 409, 420, 430, 434, 441, 457, 469, 488, 492, 503, 504, 507, 508