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 A094036 #5 May 10 2013 12:45:32 %S A094036 0,0,0,0,6,2005,280971,22795136,1345702092,65250058251,2781911443317, %T A094036 108660434574142,3991349973006198,140293749275697017, %U A094036 4775521611056597583,158758002632650598268,5185922974307536588224 %N A094036 Number of connected 5-element antichains on a labeled n-set. %F A094036 E.g.f.: (exp(31*x)-20*exp(23*x)+60*exp(19*x)+20*exp(17*x) %F A094036 +5*exp(16*x)-105*exp(15*x)-120*exp(14*x)+150*exp(13*x)+180*exp(12*x) %F A094036 -300*exp(11*x)-110*exp(10*x)+380*exp(9*x)+160*exp(8*x)-575*exp(7*x) %F A094036 +570*exp(6*x)-186*exp(5*x)-975*exp(4*x)+1645*exp(3*x)-1030*exp(2*x) %F A094036 +274*exp(x)-24)/5!. %Y A094036 Cf. A016269, A047707, A051112-A051118, A094033-A094037. %K A094036 nonn %O A094036 0,5 %A A094036 Goran Kilibarda, _Vladeta Jovovic_, Apr 22 2004