A147436 - OEIS

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A147436

Number of n X n binary arrays with all ones connected only in a 1010-1111-1010 pattern in any orientation.

%I #4 Mar 31 2012 12:35:17

%S 1,1,1,9,25,89,611,6905,105540,1741627,42117698,1578103851,

%T 82708302532,5707546949411

%N Number of n X n binary arrays with all ones connected only in a 1010-1111-1010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.0.0.1.0.1

%e .0.1.0.0.1.1.1.1

%e .1.1.1.0.0.1.0.1

%e .0.1.0.0.0.0.0.0

%e .0.0.1.0.0.0.0.0

%e .0.1.1.1.0.1.0.1

%e .0.0.1.0.1.1.1.1

%e .0.1.1.1.0.1.0.1

%K nonn

%O 1,4

%A _R. H. Hardin_