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A146414 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation. 0

%I #20 Jun 23 2018 14:33:50

%S 1,1,1,1,5,1,29,11,724,325,31142,7645,1978797,300177,263468079,

%T 35068989,83745434537,8987242465,57534772999525,4827346731624,

%U 81084039874056659,5040256291437877,231986761011592759892,10850930640918160916

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation.

%e Maximal 8 X 8 example:

%e 0 0 0 0 0 0 0 0

%e 0 0 0 0 0 0 0 0

%e 0 0 0 0 0 0 0 0

%e 0 0 0 0 0 0 0 0

%e 0 1 0 0 0 0 1 0

%e 0 1 0 0 0 0 1 0

%e 0 1 0 0 0 0 1 0

%e 1 1 1 0 0 1 1 1

%K nonn

%O 1,5

%A _R. H. Hardin_

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)