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 A055452 #16 Jan 30 2024 06:25:37
%S A055452 1,3,5,19,75,305,1270,5390,23236,101480,448085,1997115,8973255,
%T A055452 40602093,184853055,846206025,3892585325,17984308775,83417287855,
%U A055452 388297304825,1813341109825,8493372326675,39889629750600
%N A055452 a(n) = T(n,n-2), array T as in A055450.
%H A055452 G. C. Greubel, <a href="/A055452/b055452.txt">Table of n, a(n) for n = 2..500</a>
%F A055452 a(n) = 5*hypergeometric([4-n,7/2],[5],-4), for n>3. - _Peter Luschny_, Aug 15 2012
%t A055452 Table[If[n<4, 2*n-3, 5*Hypergeometric2F1[4-n,7/2,5,-4]], {n,2,40}] (* _G. C. Greubel_, Jan 29 2024 *)
%o A055452 (Magma) [n le 3 select 2*n-3 else Round(5*HypergeometricSeries2F1(4-n,7/2,5,-4)): n in [2..40]]; // _G. C. Greubel_, Jan 29 2024
%o A055452 (SageMath)
%o A055452 def A055452(n): return 2*n-3 if n<4 else 5*hypergeometric([4-n,7/2],[5],-4).simplify()
%o A055452 [A055452(n) for n in range(2,41)] # _G. C. Greubel_, Jan 29 2024
%Y A055452 Cf. A055450, A055451, A055453, A055454, A055455.
%K A055452 nonn
%O A055452 2,2
%A A055452 _Clark Kimberling_, May 18 2000