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 A319974 #15 Jan 31 2022 15:22:33
%S A319974 1,0,1,0,3,0,4,1,6,2,8,3,11,5,13,7,17,9,20,12,24,15,28,18,33,22,37,26,
%T A319974 43,30,48,35,54,40,60,45,67,51,73,57,81,63,88,70,96,77,104,84,113,92,
%U A319974 121,100,131,108,140,117,150,126,160,135,171,145,181,155,193,165,204,176,216,187,228,198,241,210,253
%N A319974 Expansion of (1-x^3+x^4+x^6)/(b(2)*b(3)*b(4)) where b(n) = 1-x^n.
%H A319974 Colin Barker, <a href="/A319974/b319974.txt">Table of n, a(n) for n = 0..1000</a>
%H A319974 Roberto De Maria Nunes Mendes, <a href="https://doi.org/10.1090/S0002-9947-1975-0357687-1">Symmetries of spherical harmonics</a>, Transactions of the American Mathematical Society 204 (1975): 161-178. See subgroup 105.
%H A319974 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (0,1,1,1,-1,-1,-1,0,1).
%F A319974 a(n) = a(n-2) + a(n-3) + a(n-4) - a(n-5) - a(n-6) - a(n-7) + a(n-9) for n>8. - _Colin Barker_, Oct 09 2018
%t A319974 LinearRecurrence[{0,1,1,1,-1,-1,-1,0,1},{1,0,1,0,3,0,4,1,6},80] (* _Harvey P. Dale_, Jan 31 2022 *)
%o A319974 (PARI) Vec((1 - x^3 + x^4 + x^6) / ((1 - x)^3*(1 + x)^2*(1 + x^2)*(1 + x + x^2)) + O(x^80)) \\ _Colin Barker_, Oct 09 2018
%K A319974 nonn,easy
%O A319974 0,5
%A A319974 _N. J. A. Sloane_, Oct 08 2018