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 A020087 #17 Sep 08 2022 08:44:44 %S A020087 1,0,0,0,2,9,50,318,2310,19060,176310,1807181,20330788,249052161, %T A020087 3299941145,47024161317,717118460090,11653174976468,201017268344078, %U A020087 3668565147279423,70619879085128903,1430052551473860292 %N A020087 a(n) = floor( Gamma(n + 1/4)/Gamma(1/4) ). %H A020087 G. C. Greubel, <a href="/A020087/b020087.txt">Table of n, a(n) for n = 0..450</a> %p A020087 Digits:= 64: x:=1/4: A020087:= proc(n,x) trunc(GAMMA(n+x)/GAMMA(x)); end; %p A020087 seq(floor(pochhammer(1/4,n)), n = 0..25); # _G. C. Greubel_, Nov 17 2019 %t A020087 Floor[Pochhammer[1/4, Range[0, 25]]] (* _G. C. Greubel_, Nov 19 2018 *) %o A020087 (PARI) vector(26, n, my(x=1/4); gamma(n-1+x)\gamma(x) ) \\ _G. C. Greubel_, Nov 19 2018 %o A020087 (Magma) [Truncate(Gamma(n + 1/4)/Gamma(1/4)): n in [0..30]]; // _G. C. Greubel_, Nov 19 2018 %o A020087 (Sage) [int(gamma(n + 1/4)/gamma(1/4)) for n in range(30)] # _G. C. Greubel_, Nov 19 2018 %Y A020087 Cf. A020042, A020087. %K A020087 nonn %O A020087 0,5 %A A020087 _Simon Plouffe_