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 A335782 #9 Jun 24 2020 10:05:45 %S A335782 9,19,135,118,396,379,135,712,1296,1243,1953,1891,2835,955,3708,3556, %T A335782 4806,4600,6003,5914,4860,7084,8838,8623,10395,10234,12339,7786,13941, %U A335782 13825,16155,15769,18333,18136,16344,19981,23085,22672,25524,25309,28494,22069 %N A335782 a(n) is the number of vertices formed by n-secting the angles of a nonagon (enneagon). %C A335782 See A335781 for illustrations. %H A335782 Lars Blomberg, <a href="/A335782/b335782.txt">Table of n, a(n) for n = 1..200</a> %Y A335782 Cf. A332428 (n-sected sides, not angles), A335781 (regions), A335783 (edges), A335784 (ngons). %K A335782 nonn %O A335782 1,1 %A A335782 _Lars Blomberg_, Jun 24 2020