Thank you for doing 3Q! 256.269.286.302 { } A305 B307 C310 D369

Thank you for doing 3Q! 256.269.286.302 { } A305 B307 C310 D369

256269286302, (), 2 + 5 + 6 = 13, 2 + 6 + 9 = 17, 2 + 8 + 6 = 16, 3 + 0 + 2 = 5, ∵ 256 + 13 = 269, 269 + 17 = 286, 286 + 16 = 302, the next number is 302 + 5 = 307