%I #5 Mar 31 2012 12:37:00
%S 225704,1008200,3376768,11309768,38569884,132454088,457030140,
%T 1565984648,5374946016,18438912648,63255158600,216863808200,
%U 742452142224,2541971328800,8704656142336,29820541899848,102157313490680
%N Number of (n+2)X9 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order
%C Column 7 of A203923
%H R. H. Hardin, <a href="/A203922/b203922.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 3*a(n-1) +2*a(n-3) +4*a(n-4) +24*a(n-5) -104*a(n-6) +301*a(n-7) -972*a(n-8) +2951*a(n-9) +4454*a(n-10) -8159*a(n-11) +3837*a(n-12) +13919*a(n-13) -26933*a(n-14) -91244*a(n-15) +142632*a(n-16) -570464*a(n-17) -98729*a(n-18) +603130*a(n-19) -1303688*a(n-20) +752149*a(n-21) +3907255*a(n-22) -1500486*a(n-23) -2419833*a(n-24) +46150970*a(n-25) -18016427*a(n-26) -44844189*a(n-27) +17393987*a(n-28) -13261937*a(n-29) +5424393*a(n-30) +454779*a(n-31) -971074*a(n-32) +371293*a(n-33) -12623962*a(n-35) +4826809*a(n-36) for n>41
%e Some solutions for n=3
%e ..0..1..1..1..1..0..1..0..1....0..0..1..1..1..1..0..0..1
%e ..0..1..1..1..0..1..0..1..0....0..0..1..1..1..1..1..0..0
%e ..1..1..1..0..1..0..1..0..0....0..1..0..1..1..1..1..1..0
%e ..1..1..0..1..0..1..0..0..0....1..0..1..0..1..1..1..1..1
%e ..1..0..1..1..1..0..0..0..1....0..0..0..1..0..1..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 07 2012
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