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 A347736 #14 Sep 13 2021 22:20:57 %S A347736 1,2,3,8,19,44,111,282,721,1880,4953,13152 %N A347736 Number of Baxter matrices of size n X (n+1) with two 1's in each row. %Y A347736 Cf. A347679. %K A347736 nonn,more %O A347736 1,2 %A A347736 _Don Knuth_, Sep 11 2021