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A184602 1/4 the number of (n+1) X 8 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3. 1

%I

%S 2880,446426,89538170,19597196907,4461217004146,1038876920232926,

%T 245608218357699105,58705095126108291860,14148602810460027001369,

%U 3432240397744170829576350,836984055384644047944565034

%N 1/4 the number of (n+1) X 8 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

%C Column 7 of A184604.

%H R. H. Hardin, <a href="/A184602/b184602.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for 3 X 8:

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 18 2011

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Last modified January 31 21:52 EST 2023. Contains 359981 sequences. (Running on oeis4.)