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 A291892 #6 Sep 09 2017 11:39:31 %S A291892 1,8,71,461,2706,14235,70161,327469,1469596,6389144,27097948, %T A291892 112630404,460511702,1857372265,7406424903,29250500171,114576069911, %U A291892 445647539540,1722814022086,6624828067482,25356181172529,96650473757117,367059233827762,1389476976680608 %N A291892 Number of symmetrically unique Dyck paths of semilength n and height eight. %H A291892 Alois P. Heinz, <a href="/A291892/b291892.txt">Table of n, a(n) for n = 8..1000</a> %H A291892 <a href="/index/Rec#order_15">Index entries for linear recurrences with constant coefficients</a>, signature (15, -84, 178, 160, -1436, 1985, 1447, -6220, 4096, 3445, -5665, 1925, 405, -275, 25). %F A291892 G.f.: x^8*(-1+7*x-35*x^2+110*x^3-171*x^4+113*x^5-25*x^6+5*x^7) / ((x-1) *(x^2-3*x+1) *(5*x^2-5*x+1) *(x^3+3*x^2-1) *(x^3-9*x^2+6*x-1) *(5*x^4-5*x^2+1)). %Y A291892 Column k=8 of A291883. %K A291892 nonn,easy %O A291892 8,2 %A A291892 _Alois P. Heinz_, Sep 05 2017