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 A335554 #8 Jun 20 2020 14:13:00 %S A335554 5,11,10,46,135,71,280,266,325,456,710,506,985,981,1085,1291,1725, %T A335554 1091,2140,2121,2310,2586,3180,2706,3750,3726,3955,4341,5090,4436, %U A335554 5825,5761,6060,6531,7455,6241,8290,8276,8620,9146,10270,9326,11245,11206,11615,12241 %N A335554 a(n) is the number of vertices formed by n-secting the angles of a pentagon. %C A335554 See A335553 for illustrations. %H A335554 Lars Blomberg, <a href="/A335554/b335554.txt">Table of n, a(n) for n = 1..200</a> %Y A335554 Cf. A330847 (n-sected sides, not angles), A335553 (regions), A335555 (edges), A335556 (ngons). %K A335554 nonn %O A335554 1,1 %A A335554 _Lars Blomberg_, Jun 20 2020