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Number of n X n binary arrays with all 1s connected, and all corners 1
0

%I #4 Dec 18 2015 18:17:23

%S 1,1,12,540,101950,75185550,210133770712

%N Number of n X n binary arrays with all 1s connected, and all corners 1

%K nonn

%O 1,3

%A _R. H. Hardin_ Jul 20 2009