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%I #5 Feb 02 2014 07:53:52
%S 256,704,1936,5984,18496,61472,204304,712352,2483776,8957984,32307856,
%T 119454944,441672256,1663878752,6268205584,23952380192,91528031296,
%U 353581084064,1365915788176,5320845079904,20727040868416,81257847595232
%N Number of (n+1)X(1+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal
%C Column 1 of A237015
%H R. H. Hardin, <a href="/A237008/b237008.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 8*a(n-1) +16*a(n-2) -268*a(n-3) +189*a(n-4) +3388*a(n-5) -5824*a(n-6) -20048*a(n-7) +49756*a(n-8) +52752*a(n-9) -196896*a(n-10) -24192*a(n-11) +369216*a(n-12) -131328*a(n-13) -262656*a(n-14) +165888*a(n-15)
%e Some solutions for n=5
%e ..3..0....1..2....1..1....2..3....0..1....1..1....3..2....1..3....2..3....2..1
%e ..3..0....2..1....0..2....3..0....1..0....2..0....2..0....1..1....1..3....0..3
%e ..0..3....3..0....2..0....2..3....1..0....2..0....2..3....1..3....3..2....2..1
%e ..3..0....0..3....2..0....1..2....0..1....2..0....0..2....1..1....1..3....1..2
%e ..3..0....3..0....1..1....3..2....1..0....0..2....2..3....1..3....2..3....3..0
%e ..2..1....2..1....0..2....3..0....1..0....1..1....1..1....0..2....1..3....1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 02 2014
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