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 A177605 #19 Mar 12 2021 19:29:56 %S A177605 1,1,20,1680,369600,166923119,134612399509,176468898415460, %T A177605 351456009607660440,1010384984894493146400,4028532188816344883922611, %U A177605 21572165225621811583520157531,151100918612288209338643024889160,1354217120536797195675961944817053840 %N A177605 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up, up, up. %H A177605 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 A177605 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 A177605 Cf. A014606. %Y A177605 Cf. A177596, A177615. %K A177605 nonn %O A177605 0,3 %A A177605 _R. H. Hardin_, May 10 2010 %E A177605 a(10) from _Alois P. Heinz_, Nov 01 2013 %E A177605 a(11)-a(13) from _Alois P. Heinz_, Aug 08 2018