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 A079928 #9 Dec 03 2021 15:44:27 %S A079928 10,91,756,5766,40688,268108,1666000,9856552,56010096,308055528, %T A079928 1650607040,8641355080,44321202192,223245029176,1106667645872, %U A079928 5409040818588,26108349881112,124618084809174,588875653169028 %N A079928 Solution to the Dancing School Problem with n girls and n+9 boys: f(n,9). %C A079928 f(g,h) = per(B), the permanent of the (0,1)-matrix B of size g X g+h with b(i,j)=1 if and only if i <= j <= i+h. See A079908 for more information. %H A079928 Jaap Spies, <a href="http://www.nieuwarchief.nl/serie5/pdf/naw5-2006-07-4-283.pdf">Dancing School Problems</a>, Nieuw Archief voor Wiskunde 5/7 nr. 4, Dec 2006, pp. 283-285. %H A079928 Jaap Spies, <a href="http://www.jaapspies.nl/mathfiles/dancingschool.pdf">Dancing School Problems, Permanent solutions of Problem 29</a>. %Y A079928 Cf. A079908-A079927. %K A079928 nonn %O A079928 1,1 %A A079928 _Jaap Spies_, Jan 28 2003 %E A079928 Corrected by _Jaap Spies_, Feb 01 2004 %E A079928 More terms Dec 15 2006