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Number of (n+1)X5 0..2 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant
1

%I #5 Mar 31 2012 12:36:05

%S 3593,197619,6275745,255375977,9406230423,363322785761,13767728347159,

%T 526156623567189,20038980564800735,764392776658915834,

%U 29139515896102512134,1111151581724887298470,42365735451420875473052

%N Number of (n+1)X5 0..2 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant

%C Column 4 of A186218

%H R. H. Hardin, <a href="/A186214/b186214.txt">Table of n, a(n) for n = 1..77</a>

%e Some solutions for 3X5

%e ..0..2..1..1..1....1..0..0..0..2....1..0..1..1..2....2..0..1..0..1

%e ..0..0..0..0..0....0..0..0..2..2....0..0..0..0..0....0..0..0..0..0

%e ..2..2..2..2..1....1..1..2..2..0....0..0..0..1..1....1..0..1..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 15 2011