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 A020021 #17 Sep 23 2022 21:52:03
%S A020021 1,1,1,2,8,36,199,1303,9844,84217,804738,8494461,98158214,1232430908,
%T A020021 16706285647,243169268857,3782633071104,62623591954943,
%U A020021 1099391947653438,20399828362013787,398929976857158503
%N A020021 Nearest integer to Gamma(n + 5/9)/Gamma(5/9).
%C A020021 a(n) equals A020066(n) or A020111(n). - _R. J. Mathar_, May 18 2007
%H A020021 G. C. Greubel, <a href="/A020021/b020021.txt">Table of n, a(n) for n = 0..445</a>
%p A020021 Digits := 64:f := proc(n,x) round(GAMMA(n+x)/GAMMA(x)); end;
%t A020021 Table[Round[Gamma[n + 5/9]/Gamma[5/9]], {n, 0, 50}] (* _G. C. Greubel_, Feb 03 2018 *)
%o A020021 (PARI) for(n=0,30, print1(round(gamma(n+5/9)/gamma(5/9)), ", ")) \\ _G. C. Greubel_, Feb 03 2018
%o A020021 (Magma) [Round(Gamma(n +5/9)/Gamma(5/9)): n in [0..30]]; // _G. C. Greubel_, Feb 03 2018
%Y A020021 Cf. A020066, A020111.
%K A020021 nonn
%O A020021 0,4
%A A020021 _Simon Plouffe_