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 A289423 #5 Jul 06 2017 10:41:08 %S A289423 1,19,207,1702,11753,72036,404984,2133296,10683684,51401251,239414383, %T A289423 1085877703,4817505085,20980377935,89946293430,380474702119, %U A289423 1590937817465,6586217434917,27029162258043,110080667694767,445314691051823,1790757125809356,7163205912228257 %N A289423 Number of Dyck paths of semilength n and height exactly 10. %H A289423 Alois P. Heinz, <a href="/A289423/b289423.txt">Table of n, a(n) for n = 10..1000</a> %H A289423 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (19,-154,695,-1912,3300,-3544,2269,-791,125,-6). %F A289423 G.f.: x^10/((x-1)*(3*x-1)*(2*x-1)*(x^2-4*x+1)*(x^5-15*x^4+35*x^3 -28*x^2 +9*x-1)). %Y A289423 Column k=10 of A080936. %K A289423 nonn,easy %O A289423 10,2 %A A289423 _Alois P. Heinz_, Jul 06 2017