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 A335800 #7 Jun 25 2020 06:27:09 %S A335800 1,10,151,50,471,440,981,220,1561,1550,2371,1750,3361,3320,4591,2440, %T A335800 5781,5720,7221,6190,8901,8830,10821,6620,12591,12510,14721,13220, %U A335800 17101,16970,19721,14860,21941,22010,24901,22880,27911,27750,31211,25030,33801,34100 %N A335800 a(n) is the number of regions formed by n-secting the angles of a decagon. %Y A335800 Cf. A333139 (n-sected sides, not angles), A335801 (vertices), A335802 (edges), A335803 (ngons). %K A335800 nonn %O A335800 1,2 %A A335800 _Lars Blomberg_, Jun 25 2020