This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A335783 #9 Jun 24 2020 10:05:53 %S A335783 9,36,261,279,783,846,288,1557,2583,2664,3897,3996,5661,2214,7407, %T A335783 7425,9603,9549,11997,12231,9738,14607,17667,17730,20781,20997,24669, %U A335783 16515,27873,28278,32301,32202,36657,36981,32706,40698,46161,46143,51039,51462,56979 %N A335783 a(n) is the number of edges formed by n-secting the angles of a nonagon (enneagon). %C A335783 See A335781 for illustrations. %H A335783 Lars Blomberg, <a href="/A335783/b335783.txt">Table of n, a(n) for n = 1..200</a> %Y A335783 Cf. A332429 (n-sected sides, not angles), A335781 (regions), A335782 (vertices), A335784 (ngons). %K A335783 nonn %O A335783 1,1 %A A335783 _Lars Blomberg_, Jun 24 2020