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 A237368 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1

%I

%S 81,288,1024,3840,14400,53760,200704,752640,2822400,10536960,39337984,

%T 147517440,553190400,2065244160,7710244864,28913418240,108425318400,

%U 404787855360,1511207993344,5667029975040,21251362406400,79338419650560

%N Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

%C Column 1 of A237375

%H R. H. Hardin, <a href="/A237368/b237368.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 196*a(n-4) for n>6

%e Some solutions for n=5

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2014

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Last modified May 22 05:03 EDT 2019. Contains 323473 sequences. (Running on oeis4.)