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 A054107 #14 Apr 24 2020 18:45:46
%S A054107 1,3,8,15,27,44,67,97,135,182,239,307,387,480,587,709,847,1002,1175,
%T A054107 1367,1579,1812,2067,2345,2647,2974,3327,3707,4115,4552,5019,5517,
%U A054107 6047,6610,7207,7839,8507,9212,9955,10737,11559
%N A054107 T(n,n-3), array T as in A054106.
%H A054107 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1).
%F A054107 For n>5, a(n) = 1/6 * (n^3 - 6n^2 + 23n - 48).
%F A054107 G.f.: x^3*(1-x+x^2)*(1+x^2-2*x^3+x^4)/(1-x)^4. [_Colin Barker_, Sep 09 2012]
%t A054107 LinearRecurrence[{4,-6,4,-1},{1,3,8,15,27,44,67},50] (* _Harvey P. Dale_, Apr 24 2020 *)
%K A054107 nonn,easy
%O A054107 3,2
%A A054107 _Clark Kimberling_