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 A195654 #17 Aug 28 2024 13:04:28 %S A195654 11264,48132,251126,1473764,9434784,64923594,476033636,3694894500, %T A195654 30179587994,257860425672,2290966142762,21042965606234, %U A195654 198765197377402,1921681775292272,18940490557328616,189679152583318596,1924757095250611458,19746535064318923758 %N A195654 Number of ways to place 10n nonattacking kings on a 20 X 2n cylindrical chessboard. %C A195654 This cylinder is horizontal: a chessboard where it is supposed that rows 1 and 2n are in contact (number of columns = 20, number of rows = 2n). %H A195654 Alex V. Breger, <a href="/A195654/b195654.txt">Table of n, a(n) for n = 1..500</a> %H A195654 Artem M. Karavaev, <a href="http://zealint.ru/koroli-na-cilindricheskoj-doske-predlozhenie.html">Zealint blog</a> (in Russian) %H A195654 V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a> %H A195654 Vaclav Kotesovec, <a href="/A195654/a195654_1.txt">Generating function</a> %H A195654 <a href="/index/Rec#order_916">Index entries for linear recurrences with constant coefficients</a>, order 916. %F A195654 Recurrence order is 916. %Y A195654 Cf. A137432, A195653, A195649, A195659. %K A195654 nonn %O A195654 1,1 %A A195654 _Vaclav Kotesovec_, Sep 22 2011