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A250906 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

%I A250906 #7 Jul 23 2025 12:50:23
%S A250906 74,13401,18077319,181725094746,13614176466285177,
%T A250906 7601083164098734394079,31627738616791159166366474706,
%U A250906 980775577015597559408509097508207843,226662690545871494601898816284099112431799133
%N A250906 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.
%C A250906 Diagonal of A250913
%H A250906 R. H. Hardin, <a href="/A250906/b250906.txt">Table of n, a(n) for n = 1..10</a>
%e A250906 Some solutions for n=2
%e A250906 ..0..2..2....0..1..0....0..1..2....0..0..1....1..2..1....1..1..2....0..2..0
%e A250906 ..1..2..1....2..2..0....0..0..1....2..2..2....0..0..0....0..0..1....1..2..0
%e A250906 ..0..2..1....0..0..0....2..2..2....2..2..0....0..0..1....1..2..2....1..0..0
%K A250906 nonn
%O A250906 1,1
%A A250906 _R. H. Hardin_, Nov 28 2014