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 A177615 #17 Mar 12 2021 19:30:59 %S A177615 1,1,20,1680,369600,168168000,137127810959,182138398520387, %T A177615 367988956112888200,1074073326771101149080,4350318942513425384777400, %U A177615 23673963203663687592089088600,168569155472096397352266896207243,1536148007688582239667327040442799059 %N A177615 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up, up, up, up. %H A177615 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 A177615 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 A177615 Cf. A014606. %Y A177615 Cf. A177596, A177605. %K A177615 nonn %O A177615 0,3 %A A177615 _R. H. Hardin_, May 10 2010 %E A177615 a(10)-a(13) from _Alois P. Heinz_, Aug 08 2018