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%I #4 Feb 01 2014 16:08:15
%S 357316,178006252,73196854050,33887916009662,14993765290435528,
%T 6794451721009466204,3048340953731729204888,1374356722643878889083728,
%U 618307293958885883485092842,278452157946874640429634543018
%N Number of (n+1)X(4+1) 0..3 arrays with the maximum of every 2X2 subblock equal
%C Column 4 of A236949
%H R. H. Hardin, <a href="/A236945/b236945.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 424*a(n-1) +62841*a(n-2) -23821786*a(n-3) -323958504*a(n-4) +344301777418*a(n-5) -9832213915612*a(n-6) -1327040412239104*a(n-7) +52919393633676596*a(n-8) +1661194003472702658*a(n-9) -81478174052335909816*a(n-10) -414773977421061937634*a(n-11) +43172424299930717855749*a(n-12) -257155013696867677011256*a(n-13) -4323650605031746975388613*a(n-14) +25177679306370855714028416*a(n-15) +180403547575480950604999824*a(n-16) -429577562160330756023400192*a(n-17) -1243975490088381892935023616*a(n-18) +3997026635500888039521681408*a(n-19) -2980738212000703127936040960*a(n-20) -103313284358758051809853440*a(n-21) +559534813959237271761715200*a(n-22)
%e Some solutions for n=1
%e ..0..2..2..0..3....3..0..3..0..2....1..2..3..0..3....1..2..0..3..2
%e ..3..1..3..2..2....2..2..1..2..3....2..3..2..0..0....2..3..1..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 01 2014
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