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 A345648 #8 Jun 22 2021 12:26:10 %S A345648 0,0,24,228,904,2788,5880,13008,22120,37976,58584,95472,125016,195816, %T A345648 255064,337916,444760,611760,719800,978388,1127088,1411756,1736776, %U A345648 2174584,2389552,2995336,3504768 %N A345648 Number of polygons formed outside an n X n square when connecting all 4n points on the perimeter of the square by infinite lines. %C A345648 For n = 0 to n = 11 the number of polygons formed outside the n x n square is less than the number formed inside the square. This changes for n >= 12 when the number formed outside becomes greater. The ratio of the number of polygons outside to the number inside for n = 26 is about 1.07 . If this ratio is unbounded or approaches some finite value as n -> infinity is not known. %C A345648 See A345459 for images of the polygons. %F A345648 a(n) = A345459(n) - A255011(n). %Y A345648 Cf. A345459 (number inside and outside with square), A255011 (number inside the square), A344993, A344857, A092098, A007678. %K A345648 nonn,more %O A345648 0,3 %A A345648 _Scott R. Shannon_ and _N. J. A. Sloane_, Jun 21 2021