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 A347674 #14 Sep 16 2021 01:56:30 %S A347674 1,6,69,972,16355,306352,6175181 %N A347674 Number of Baxter matrices of size n X n. %Y A347674 Main diagonal of A347672. %K A347674 nonn,more %O A347674 1,2 %A A347674 _N. J. A. Sloane_, Sep 10 2021 %E A347674 a(4) corrected by _Michael S. Branicky_, Sep 15 2021