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 A329511 #16 Oct 02 2023 15:24:54 %S A329511 1,3,6,9,11,11,10,9,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, %T A329511 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, %U A329511 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 %N A329511 Expansion of (1 + x)*(1 + x^2)^2*(1 + x - x^3) / (1 - x). %H A329511 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1). %F A329511 a(n) = 8 for n >= 8. %o A329511 (PARI) Vec((1 + x)*(1 + x^2)^2*(1 + x - x^3) / (1 - x) + O(x^80)) \\ _Colin Barker_, Nov 23 2019 %Y A329511 Row 4 of array in A329508. %K A329511 nonn,easy %O A329511 0,2 %A A329511 _N. J. A. Sloane_, Nov 22 2019