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%I #7 Nov 12 2022 19:56:03
%S 5344,311730,18257013,1070374436,62735788524,3677337022406,
%T 215547981233289,12634446300216814,740573387875513027,
%U 43409027745399571245,2544438765507573177231,149143369457644414336487
%N Number of (n+1) X 4 0..2 arrays with no 2 X 2 subblock commuting with any of its horizontal and vertical 2 X 2 subblock neighbors.
%C Column 3 of A187441.
%H R. H. Hardin, <a href="/A187435/b187435.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 3 X 4
%e ..1..1..1..2....0..0..2..1....2..2..2..0....0..0..0..2....2..1..1..1
%e ..0..1..1..1....0..1..0..2....0..2..1..0....0..2..2..0....0..0..1..0
%e ..1..0..1..0....0..2..2..1....1..0..1..1....0..1..1..0....0..2..1..0
%Y Cf. A187441.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 10 2011
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