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A227441 Number of n X 5 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 6 binary array having two adjacent 1's and two adjacent 0's. 1

%I

%S 32,932,24568,636996,16517429,428106288,11089818502,287216470434,

%T 7438206463442,192627120115467,4988415429339854,129183253864605762,

%U 3345409035962645279,86634725216940266856,2243544511793704829943

%N Number of n X 5 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 6 binary array having two adjacent 1's and two adjacent 0's.

%C Column 5 of A227442.

%H R. H. Hardin, <a href="/A227441/b227441.txt">Table of n, a(n) for n = 1..24</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jul 11 2013

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Last modified October 3 09:59 EDT 2022. Contains 357231 sequences. (Running on oeis4.)