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 A335801 #5 Jun 25 2020 06:26:59 %S A335801 10,11,160,31,480,371,990,171,1570,1431,2380,1551,3370,3131,4600,2211, %T A335801 5790,5481,7230,5851,8910,8521,10830,5751,12600,12151,14730,12721, %U A335801 17110,16541,19730,14231,21950,21531,24910,22201,27920,27201,31220,24181,33810,33501 %N A335801 a(n) is the number of vertices formed by n-secting the angles of a decagon. %Y A335801 Cf. A332418 (n-sected sides, not angles), A335800 (regions), A335802 (edges), A335803 (ngons). %K A335801 nonn %O A335801 1,1 %A A335801 _Lars Blomberg_, Jun 25 2020