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A184022 1/8 the number of (n+1)X3 0..3 arrays with all 2X2 subblock sums the same 1

%I

%S 88,204,491,1347,3781,11541,35771,117321,389053,1343649,4678331,

%T 16789497,60610141,223849641,830159051,3132039921,11849473693,

%U 45412071969,174350721371,675875378697,2623000758301,10253216100441,40107029625131

%N 1/8 the number of (n+1)X3 0..3 arrays with all 2X2 subblock sums the same

%C Column 2 of A184029

%H R. H. Hardin, <a href="/A184022/b184022.txt">Table of n, a(n) for n = 1..200</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 4X3

%e ..1..1..3....2..3..2....2..3..2....0..2..1....1..3..1....0..2..0....0..3..0

%e ..2..3..0....2..0..2....3..2..3....1..2..0....1..1..1....0..3..0....3..2..3

%e ..1..1..3....2..3..2....2..3..2....2..0..3....3..1..3....2..0..2....2..1..2

%e ..2..3..0....2..0..2....3..2..3....3..0..2....2..0..2....3..0..3....3..2..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 08 2011

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Last modified October 19 12:21 EDT 2021. Contains 348088 sequences. (Running on oeis4.)