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 A351288 #9 Feb 07 2022 17:10:39 %S A351288 1,2,6,26,182,2170,45640,1728722,119663816,15307529470,3650708270236, %T A351288 1634796996516742,1382620288569817496 %N A351288 Number of symmetric 0-1 matrices with nondecreasing row sums. %Y A351288 Cf. A016121, A351158, A351287. %K A351288 nonn,more %O A351288 0,2 %A A351288 _Max Alekseyev_, Feb 06 2022 %E A351288 a(8)-a(12) from _Andrew Howroyd_, Feb 06 2022