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 A091026 #5 Jun 29 2023 18:31:13 %S A091026 5,114,771,3235,10365,27825,65828,141552,282375,530090,946275,1619007, %T A091026 2671123,4270245,6640800,10078280,14966001,21794634,31184795,43912995, %U A091026 60941265,83450785,112879860,150966600,199796675,261856530,340092459 %N A091026 Fifth column (m=6) of array A090452. %H A091026 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (9, -36, 84, -126, 126, -84, 36, -9, 1). %F A091026 a(n)= (n+1)*(n+2)*(n^6+45*n^5+745*n^4+5595*n^3+18694*n^2+22440*n+7200)/2880. 2880=8!/(2*7). %F A091026 G.f.: (5+69*x-75*x^2-20*x^3+60*x^4-30*x^5+5*x^6)/(1-x)^9. %Y A091026 Cf. A090454, A091027. %K A091026 nonn,easy %O A091026 0,1 %A A091026 _Wolfdieter Lang_, Dec 23 2003