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 A177646 #13 Aug 08 2018 22:14:02 %S A177646 1,1,70,34650,63063000,302857024681,3171644273043481, %T A177646 63767771149790231020,2246276459710030995597000, %U A177646 129398739548198780715411006000,11551019408580550906836084615390361,1530266028377887010801240993038984544961,290384391726747532382877490399579938116889720 %N A177646 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up. %H A177646 Mingjia Yang, Doron Zeilberger, <a href="https://arxiv.org/abs/1805.06077">Increasing Consecutive Patterns in Words</a>, arXiv:1805.06077 [math.CO], 2018. %Y A177646 Cf. A014608. %K A177646 nonn %O A177646 0,3 %A A177646 _R. H. Hardin_, May 10 2010 %E A177646 a(8) from _Alois P. Heinz_, Nov 01 2013 %E A177646 a(9)-a(12) from _Alois P. Heinz_, Aug 08 2018