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 A020066 #24 Sep 08 2022 08:44:44 %S A020066 1,0,0,2,7,35,198,1302,9843,84216,804738,8494460,98158213,1232430908, %T A020066 16706285646,243169268856,3782633071103,62623591954942, %U A020066 1099391947653437,20399828362013787,398929976857158503 %N A020066 Integer part of Gamma(n+5/9)/Gamma(5/9). %H A020066 G. C. Greubel, <a href="/A020066/b020066.txt">Table of n, a(n) for n = 0..445</a> %p A020066 Digits := 64:f := proc(n,x) trunc(GAMMA(n+x)/GAMMA(x)); end; %p A020066 seq(trunc(pochhammer(5/9,n)), n = 0..20); # _G. C. Greubel_, Nov 13 2019 %t A020066 IntegerPart[Pochhammer[5/9, Range[0, 20]]] (* _G. C. Greubel_, Nov 13 2019 *) %o A020066 (PARI) P(n,x) = gamma(x+n)/gamma(x); %o A020066 vector(21, n, truncate(P(n-1, 5/9)) ) \\ _G. C. Greubel_, Nov 13 2019 %o A020066 (Magma) [Truncate(Gamma(n+5/9)/Gamma(5/9)): n in [0..20]]; // _G. C. Greubel_, Nov 13 2019 %o A020066 (Sage) [int(rising_factorial(5/9, n)) for n in (0..20)] # _G. C. Greubel_, Nov 13 2019 %Y A020066 Cf. A020064, A020065, A020067, A020068, A020069. %Y A020066 Cf. A020021, A020111. %K A020066 nonn %O A020066 0,4 %A A020066 _Simon Plouffe_