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 A047678 #6 Mar 07 2020 01:35:37 %S A047678 3,24,2304,15925248,26418075402240,26294650153960734720000, %T A047678 32976469951036202010909081600000000, %U A047678 97269850356607540052618180220048900096000000000000,1156838823908660229380221584221016428369393918222008320000000000000000 %N A047678 Row 3 of square array defined in A047675. %K A047678 nonn,easy %O A047678 1,1 %A A047678 _N. J. A. Sloane_