#[Jelly], length 17 [^/P-`mvÇ-ıḃ-ṫ€]* Python regex. Tightening the knot, this bans some more useful things, for your aid here are the banned bytes: /PQRSTUVWXYZ[\]^_`mvÇÐÑרÞßæçðñ÷øþĊċĖėĠġİıḃḄḅḊḋḌḍḞḟḢḣḤḥḲḳḶḷṀṁṂṃṄṅṆṇṖṗṘṙṚṛṠṡṢṣṪṫ€ *just under a third of them!* For an input of `4` mine outputs: 1 2 3 4 8 7 6 5 9 10 11 12 16 15 14 13 ...because I formatted a list of lists as a grid with `G`. [Jelly]: https://github.com/DennisMitchell/jelly