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 A079925 #12 Dec 03 2021 18:49:13 %S A079925 7,43,234,1146,5150,21652,86608,334072,1249768,4557284,16266830, %T A079925 57031078,196933710,671224467,2262089361,7548882573,24975936372, %U A079925 82012110724,267505920876,867390073384 %N A079925 Solution to the Dancing School Problem with n girls and n+6 boys: f(n,6). %C A079925 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 A079925 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 A079925 Jaap Spies, <a href="http://www.jaapspies.nl/mathfiles/dancingschool.pdf">Dancing School Problems, Permanent solutions of Problem 29</a>. %Y A079925 Cf. A079908-A079928. %K A079925 nonn,more %O A079925 1,1 %A A079925 _Jaap Spies_, Jan 28 2003 %E A079925 Corrected by _Jaap Spies_, Feb 01 2004 %E A079925 More terms Dec 14 2006