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A146600 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,5,19,39,83,233,711,2313,8511,40097,191977,1081845,

%T 6288993,41547129,292524045,2387601825,20697818111

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.0.0.0.0.1.1.1

%e .1.0.0.0.0.1.0.0

%e .1.1.1.1.0.1.0.0

%e .0.0.0.0.0.1.0.0

%e .0.0.1.0.0.0.0.0

%e .0.0.1.0.1.1.1.1

%e .0.0.1.0.0.0.0.1

%e .1.1.1.0.0.0.0.1

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified February 4 19:58 EST 2023. Contains 360059 sequences. (Running on oeis4.)