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 A029587 #7 Jul 08 2025 19:15:13 %S A029587 0,0,0,0,1,5,30,210,1470,13230,132300,1455300,17671500,229729500, %T A029587 3216213000,48243195000,771323553000,13112500401000,236025007218000, %U A029587 4484475137142000,89692802577378000,1883548854124938000,41438074790748636000,953075720187218628000 %N A029587 a(n) = A029571(n) / 6. %Y A029587 Cf. A029571. %K A029587 nonn %O A029587 0,6 %A A029587 _N. J. A. Sloane_