A177637 - OEIS

%I #11 Aug 08 2018 18:14:05

%S 1,1,70,20251,19387201,47213021620,246331792085401,

%T 2443003220126326201,42187963284758541226270,

%U 1186523552401322210323083451,51563739785315001241213870794001,3318691262415781291317711866423813020,305473715050119138647351857854838738832401

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

%K nonn

%O 0,3

%A _R. H. Hardin_, May 10 2010

%E a(8) from _Alois P. Heinz_, Oct 22 2013

%E a(0), a(9)-a(12) from _Alois P. Heinz_, Aug 08 2018