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%I #11 Aug 27 2018 06:04:19
%S 5,25,106,419,1635,6392,25047,98221,385194,1510527,5923295,23227112,
%T 91080915,357157713,1400531394,5491938683,21535675531,84448377880,
%U 331149514687,1298544789829,5092015833594,19967447759719,78298847269031
%N Number of n X 4 0..1 arrays with rows nondecreasing and antidiagonals unimodal.
%C Column 4 of A224133.
%H R. H. Hardin, <a href="/A224129/b224129.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 5*a(n-1) - 5*a(n-2) + 2*a(n-3) + 4*a(n-4).
%F Empirical g.f.: x*(5 + 6*x^2 + 4*x^3) / (1 - 5*x + 5*x^2 - 2*x^3 - 4*x^4). - _Colin Barker_, Aug 27 2018
%e Some solutions for n=3:
%e ..0..0..1..1....0..0..0..1....1..1..1..1....1..1..1..1....0..1..1..1
%e ..0..0..0..0....0..0..1..1....0..0..0..1....0..1..1..1....1..1..1..1
%e ..0..0..0..0....1..1..1..1....0..0..0..1....0..0..1..1....0..0..0..0
%Y Cf. A224133.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 31 2013
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