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 A193055 #31 May 05 2025 15:12:21 %S A193055 0,0,0,0,44202,55488142,34524432316,13267364410532,7112881119092574, %T A193055 4235482818156697040,2122880233853945590892,1105420672289849239070962, %U A193055 586820057145837880942582376,311550865881297158579957164664,162703111270636640083076205067310 %N A193055 Number of closed knight's tours on an 8 X n board. %H A193055 Don Knuth, <a href="/A193055/b193055.txt">Table of n, a(n) for n = 1..32</a> (terms up to a(20) from KeyTo9_Fans and Zhao Hui Du) %H A193055 <a href="http://bbs.emath.ac.cn/thread-3231-5-1.html">The Chinese Webpage for the result</a> by KeyTo9_Fans %H A193055 Zhao Hui Du, <a href="/A193055/a193055.txt">C program to calculate terms</a> %F A193055 a(n) = A383664(4n). - _Don Knuth_, May 05 2025 %o A193055 (C) See Du link. %Y A193055 Cf. A175881, A193054, A383664. %K A193055 nonn %O A193055 1,5 %A A193055 _Zhao Hui Du_, Jul 15 2011