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%I #5 Jan 21 2015 20:13:33
%S 512,2736,11872,51856,222400,914112,3644672,14254784,54856896,
%T 208045808,779267488,2888373904,10608724864,38652879616,139832334592,
%U 502668749632,1796764701568,6389654104112,22617698170848,79723311240208
%N Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally
%C Column 1 of A253993
%H R. H. Hardin, <a href="/A253986/b253986.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 8*a(n-1) -21*a(n-2) +30*a(n-3) -44*a(n-4) -60*a(n-5) +252*a(n-6) -140*a(n-7) +446*a(n-8) +340*a(n-9) -1082*a(n-10) +32*a(n-11) -1048*a(n-12) -844*a(n-13) +1800*a(n-14) +548*a(n-15) +215*a(n-16) +324*a(n-17) -293*a(n-18) -54*a(n-19) -24*a(n-21) +16*a(n-22)
%e Some solutions for n=4
%e ..0..1..1....0..1..0....0..0..0....0..1..0....1..0..0....0..0..0....0..1..1
%e ..1..1..1....0..1..1....0..1..0....0..0..0....0..0..0....1..1..1....0..0..1
%e ..1..0..1....1..1..0....0..0..0....1..0..0....1..0..0....0..0..1....1..0..1
%e ..1..1..1....1..1..0....1..1..0....0..0..0....0..1..1....1..1..1....1..1..1
%e ..0..0..1....0..0..1....1..1..1....1..0..0....0..1..0....1..1..1....1..1..0
%e ..1..0..1....0..0..1....1..1..0....1..0..0....0..0..1....1..0..1....0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 21 2015
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