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 A335770 #13 Mar 24 2022 16:32:53 %S A335770 8,9,24,89,328,57,624,577,744,993,1624,793,2240,2129,2464,2913,3936, %T A335770 2121,4816,4705,5192,5785,7224,5233,8312,8265,8928,9649,11520,8929, %U A335770 12856,12841,13616,14561,16816,12929,18424,18345,19328,20425,23080,19337,25008,24849 %N A335770 a(n) is the number of vertices formed by n-secting the angles of an octagon. %C A335770 See A335769 for illustrations. %H A335770 Lars Blomberg, <a href="/A335770/b335770.txt">Table of n, a(n) for n = 1..200</a> %Y A335770 Cf. A333109 (n-sected sides, not angles), A335769 (regions), A335771 (edges), A335772 (ngons). %K A335770 nonn %O A335770 1,1 %A A335770 _Lars Blomberg_, Jun 23 2020