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%I #7 Jan 14 2017 01:41:14
%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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