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%I #6 Apr 30 2022 21:31:59
%S 3456,186304,10046784,541815424,29219848960,1575813859456,
%T 84982973330688,4583095819732736,247164420634563840,
%U 13329472755050099712,718852832815666617344,38767429496362104931840,2090711090157985348366336
%N Number of (n+1) X (2+1) 0..3 arrays with no 2 X 2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.
%C Column 2 of A251491.
%H R. H. Hardin, <a href="/A251485/b251485.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 64*a(n-1) -556*a(n-2) +704*a(n-3) -356*a(n-4) -3968*a(n-5) +36*a(n-6) +1152*a(n-7).
%e Some solutions for n=2
%e ..2..1..0....0..1..2....0..2..3....1..2..3....1..1..1....1..1..2....1..3..0
%e ..3..2..0....3..1..1....2..2..0....1..3..2....1..2..2....1..1..2....1..0..1
%e ..2..0..1....3..0..2....1..2..2....2..3..2....3..1..2....1..1..3....1..3..1
%Y Cf. A251491.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 03 2014
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