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 A323140 #7 Jan 10 2019 06:03:52 %S A323140 1,7,45,280,1712,10351,62082,370142,2196701,12988928,76572159, %T A323140 450277842,2642226994,15476427641,90508059371 %N A323140 Number of uncrossed king's paths of length n, reduced for symmetry, A272773/8. %C A323140 For comments, programs, references see A272773. %F A323140 a(n) = A272773(n) / 8. %Y A323140 Cf. A272773, A003192, A046661, A323141. %K A323140 nonn,hard,more %O A323140 1,2 %A A323140 _Hugo Pfoertner_, Jan 05 2019