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 A289422 #7 Sep 28 2018 15:06:19
%S A289422 1,17,168,1267,8099,46305,244412,1215448,5773812,26457508,117789057,
%T A289422 512231849,2184870646,9170250565,37970054320,155415748396,
%U A289422 629889111670,2531276312305,10097407871079,40020455708541,157723815500329,618505879152961,2414718498047580
%N A289422 Number of Dyck paths of semilength n and height exactly 9.
%H A289422 Alois P. Heinz, <a href="/A289422/b289422.txt">Table of n, a(n) for n = 9..1000</a>
%H A289422 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (17,-121,468,-1068,1461,-1163,496,-95,5).
%F A289422 G.f.: -x^9/((x^2-3*x+1)*(5*x^2-5*x+1)*(x^5-15*x^4+35*x^3-28*x^2+9*x-1)).
%t A289422 LinearRecurrence[{17,-121,468,-1068,1461,-1163,496,-95,5},{1,17,168,1267,8099,46305,244412,1215448,5773812},30] (* _Harvey P. Dale_, Sep 28 2018 *)
%Y A289422 Column k=9 of A080936.
%K A289422 nonn,easy
%O A289422 9,2
%A A289422 _Alois P. Heinz_, Jul 06 2017