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 A273582 #9 Jul 19 2017 10:42:12 %S A273582 1,4,16,66,296,1334,6322,30930,158008,837530,4624462,26379128, %T A273582 155536148,944173842,5898860754,37848982610,249347884600, %U A273582 1684168485302,11655678956456,82532887947582,597399961515754,4414814240798968,33281178413298246,255687224968704234 %N A273582 Number of solid standard Young tableaux of n cells and height two. %H A273582 S. B. Ekhad, D. Zeilberger, <a href="https://arxiv.org/abs/1202.6229">Computational and Theoretical Challenges on Counting Solid Standard Young Tableaux</a>, arXiv:1202.6229 [math.CO], 2012 %H A273582 Wikipedia, <a href="https://en.wikipedia.org/wiki/Young_tableau">Young tableau</a> %Y A273582 Column k=2 of A214753. %K A273582 nonn %O A273582 2,2 %A A273582 _Alois P. Heinz_, May 25 2016