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 A295475 #7 Mar 26 2022 18:35:53
%S A295475 1,461890,935387159850,2182519096151533552,5398397695681095146608490,
%T A295475 13787702861800799166026014363140,
%U A295475 35936545440404705429404600374145350960,94988519542968717273112119046397042704228800,253668511451664737174164792111754605640400674756970
%N A295475 a(n) = (20*n)!*(3*n)!/((10*n)!*(9*n)!*(4*n)!).
%F A295475 G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/9, 2/9, 4/9, 1/2, 5/9, 7/9, 8/9], 40960000000000/14348907*x).
%t A295475 Table[((20n)!(3n)!)/((10n)!(9n)!(4n)!),{n,0,20}] (* _Harvey P. Dale_, Mar 26 2022 *)
%Y A295475 Cf. A295431.
%K A295475 nonn
%O A295475 0,2
%A A295475 _Gheorghe Coserea_, Nov 28 2017