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 A366478 #19 Nov 03 2023 08:20:57
%S A366478 1,2,8,40,137,356,772,1478,2585,4222,6536,9692,13873,19280,26132,
%T A366478 34666,45137,57818,73000,90992,112121,136732,165188,197870,235177,
%U A366478 277526,325352,379108,439265,506312,580756,663122,753953,853810,963272,1082936,1213417,1355348,1509380
%N A366478 a(n) = (3*n^4 - 4*n^3 + n^2 + 4*n + 4)/4.
%C A366478 This is one-third of the total number of points in the configuration obtained at the n-th stage of A365929.
%H A366478 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A366478 G.f.: -(2*x^4+10*x^3+8*x^2-3*x+1)/(x-1)^5. - _Alois P. Heinz_, Nov 02 2023
%t A366478 Table[(3n^4 - 4n^3 + n^2 + 4n + 4) /4, {n, 0, 38}] (* _Paul F. Marrero Romero_, Nov 02 2023 *)
%Y A366478 Cf. A365929.
%K A366478 nonn,easy
%O A366478 0,2
%A A366478 _N. J. A. Sloane_, Oct 29 2023