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 A348789 #3 Nov 22 2021 19:59:05 %S A348789 1,4,12,225,4008,1504776,158753816 %N A348789 Number of ways to divide an n X n grid of squares into edge-connected polygons of equal area. %C A348789 Row sums of A348452. %Y A348789 Cf. A348452. %K A348789 nonn,more %O A348789 1,2 %A A348789 _N. J. A. Sloane_, Nov 22 2021