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A145774 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either two adjacent vertically or two adjacent horizontally. 0

%I #3 Mar 31 2012 12:35:08

%S 1,3,5,18,124,889,9624,117592,3086899,71342470,3940302454,

%T 162484045629,19765145478158,1482360209667114,393627814809408705,

%U 53489489176352337875,30927278141339388397696,7617052120730650394236371

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either two adjacent vertically or two adjacent horizontally.

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 18 2008

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Last modified April 25 06:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)