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 A177596 #19 Mar 12 2021 19:30:11 %S A177596 1,1,20,1109,149777,40505320,19324787629,14885613436177, %T A177596 17346023517866756,29095672934852234945,67554301929824585326841, %U A177596 210353969049597164741983000,855886755812900060235077981449,4452236180954942685194928540509281 %N A177596 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up. %H A177596 Mingjia Yang and Doron Zeilberger, <a href="https://arxiv.org/abs/1805.06077">Increasing Consecutive Patterns in Words</a>, arXiv:1805.06077 [math.CO], 2018. %H A177596 Mingjia Yang, <a href="https://doi.org/10.7282/t3-d9z1-aw94">An experimental walk in patterns, partitions, and words</a>, Ph. D. Dissertation, Rutgers University (2020). %Y A177596 Cf. A177605, A177615. %K A177596 nonn %O A177596 0,3 %A A177596 _R. H. Hardin_, May 10 2010 %E A177596 a(10) from _Alois P. Heinz_, Oct 22 2013 %E A177596 a(0), a(11)-a(13) from _Alois P. Heinz_, Aug 08 2018