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Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up.
0

%I #13 Aug 08 2018 22:14:02

%S 1,1,70,34650,63063000,302857024681,3171644273043481,

%T 63767771149790231020,2246276459710030995597000,

%U 129398739548198780715411006000,11551019408580550906836084615390361,1530266028377887010801240993038984544961,290384391726747532382877490399579938116889720

%N Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up.

%H 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 Cf. A014608.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 10 2010

%E a(8) from _Alois P. Heinz_, Nov 01 2013

%E a(9)-a(12) from _Alois P. Heinz_, Aug 08 2018