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%I #4 Feb 08 2014 06:40:15
%S 1728,19288,221512,2584128,30171224,351706460,4095080272,47706224548,
%T 556422733920,6487687918860,75553828752976,880154610523828,
%U 10265420092915416,119691576863205808,1393902790577666192
%N Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 2 of A237494
%H R. H. Hardin, <a href="/A237490/b237490.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 20076*a(n-4) -30963114*a(n-8) +17742299774*a(n-12) -4486150673585*a(n-16) +504677649505566*a(n-20) -29356316158732439*a(n-24) +966060370545963788*a(n-28) -18497168436220523153*a(n-32) +198997625891729725690*a(n-36) -1038614063422502404638*a(n-40) +1078455559202968849160*a(n-44) +9561579193839899167904*a(n-48) -32659993350070324019856*a(n-52) +48397569970373697382656*a(n-56) -40369120219890399840128*a(n-60) +24366820699820541125632*a(n-64) -1366745837841586018304*a(n-68) -11349801641134789099520*a(n-72) +4447227527163548532736*a(n-76) -405271925986135375872*a(n-80) for n>82
%e Some solutions for n=2
%e ..3..1..1....1..2..2....0..2..2....3..2..2....2..2..0....0..2..3....2..3..0
%e ..0..1..3....3..2..1....2..0..1....3..2..1....3..1..0....2..2..2....1..1..2
%e ..1..0..1....3..1..0....0..3..0....0..2..3....1..0..3....0..1..1....1..3..3
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 08 2014
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