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 A079922 #12 Jan 03 2022 21:20:56 %S A079922 4,13,36,90,212,478,1044,2227,4664,9627,19640,39684,79544,158364, %T A079922 313464,617365,1210588,2364713,4603388,8934142,17291756,33385018, %U A079922 64311660,123634471,237233712,454429239,869095472,1659708488 %N A079922 Solution to the Dancing School Problem with n girls and n+3 boys: f(n,3). %C A079922 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 A079922 Jaap Spies, <a href="http://www.jaapspies.nl/mathfiles/dancingschool.pdf">Dancing School Problems, Permanent solutions of Problem 29</a>, Nieuw Archief voor Wiskunde 5/7 nr. 4, Dec 2006, pp. 283-285. %F A079922 Empirical g.f.: -x*(x^7-4*x^4+2*x^3+3*x-4) / ((x-1)^2*(x^3+x^2+x-1)^2). - _Colin Barker_, Jan 04 2015 %Y A079922 Cf. A079908-A079928. %K A079922 nonn %O A079922 1,1 %A A079922 _Jaap Spies_, Jan 28 2003 %E A079922 More terms from _Jaap Spies_, Dec 15 2006