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%I #4 Jan 20 2016 07:43:09
%S 1,35,57,123,249,502,1008,2020,4044,8092,16188,32380,64764,129532,
%T 259068,518140,1036284,2072572,4145148,8290300,16580604,33161212,
%U 66322428,132644860,265289724,530579452,1061158908,2122317820,4244635644
%N Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to or 1 greater than any west or northeast neighbors modulo n and the upper left element equal to 0.
%C Column 4 of A267742.
%H R. H. Hardin, <a href="/A267738/b267738.txt">Table of n, a(n) for n = 1..84</a>
%e Some solutions for n=4
%e ..0..1..1..2....0..0..0..0....0..0..0..0....0..0..1..2....0..1..2..2
%e ..1..2..2..3....1..1..1..2....1..1..1..1....1..2..2..3....1..2..3..3
%e ..3..3..0..0....1..2..2..3....2..2..2..3....3..3..0..1....2..3..3..0
%e ..3..0..1..2....2..3..3..3....2..3..3..3....0..1..2..3....0..0..1..1
%Y Cf. A267742.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 20 2016
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