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%I A266424 #4 Dec 29 2015 09:51:58
%S A266424 5,25,106,404,1391,4383,12758,34611,88206,212609,487630,1069664,
%T A266424 2254259,4581719,9011222,17200214,31944220,57853902,102380657,
%U A266424 177341666,301156443,502075951,822789263,1326908069,2107999291,3302022425
%N A266424 Number of nX4 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.
%C A266424 Column 4 of A266428.
%H A266424 R. H. Hardin, <a href="/A266424/b266424.txt">Table of n, a(n) for n = 1..66</a>
%e A266424 Some solutions for n=4
%e A266424 ..0..0..1..1....0..0..0..1....0..0..0..0....0..0..1..1....0..0..0..1
%e A266424 ..0..1..0..1....0..1..1..0....0..1..1..1....0..0..1..1....0..0..1..1
%e A266424 ..0..1..1..1....0..1..1..1....0..1..1..1....0..1..1..1....0..1..1..1
%e A266424 ..1..0..0..0....1..0..1..1....1..1..1..1....0..1..1..1....1..1..0..0
%Y A266424 Cf. A266428.
%K A266424 nonn
%O A266424 1,1
%A A266424 _R. H. Hardin_, Dec 29 2015

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