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 A055453 #11 Jan 30 2024 06:25:41
%S A055453 1,4,9,14,56,230,965,4120,17846,78244,346605,1549030,6976140,31628838,
%T A055453 144250962,661352970,3046379300,14091723450,65432979080,304880016970,
%U A055453 1425043805000,6680031216850,31396257423925,147923222356036
%N A055453 a(n) = T(n,n-3), array T as in A055450.
%H A055453 G. C. Greubel, <a href="/A055453/b055453.txt">Table of n, a(n) for n = 3..500</a>
%F A055453 a(n) = 14*Hypergeometric2F1([6-n, 9/2], [6], -4), for n >= 6 and a(n) = (n-2)^2 for 3 <= n <= 5. - _G. C. Greubel_, Jan 30 2024
%t A055453 Table[If[n<6, (n-2)^2, 14*Hypergeometric2F1[6-n,9/2,6,-4]], {n,3,40}] (* _G. C. Greubel_, Jan 30 2024 *)
%o A055453 (Magma) [n le 6 select (n-2)^2 else Round(14*HypergeometricSeries2F1(6-n,9/2,6,-4)): n in [3..40]]; // _G. C. Greubel_, Jan 30 2024
%o A055453 (SageMath)
%o A055453 def A055453(n): return (n-2)^2 if n<6 else 14*hypergeometric([6-n,9/2],[6],-4).simplify()
%o A055453 [A055453(n) for n in range(3,41)] # _G. C. Greubel_, Jan 30 2024
%Y A055453 Cf. A055450, A055451, A055452, A055454, A055455.
%K A055453 nonn
%O A055453 3,2
%A A055453 _Clark Kimberling_, May 18 2000