Hi Ed, great post about the no-three-in-line problem! I created an open-source GitHub project that computes maximal no-3-in-line point sets for n×n grids, with visualizations and full dataset records. Feel free to take a look: https://github.com/aujurd22/no3inline-missing-center
https://arxiv.org/abs/2203.13170 already extends https://oeis.org/A277433. While OEIS claims that a(11) <= 10, a(12) <= 10, that article states a(11) = a(12) = 10.
Thanks, Thomas. I've found solutions matching everything in the paper.
Solutions for values 16, 17 and 21 have been improved by Dmitry Kamenetsky. The list of solutions and code for displaying them has been updated.
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