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A146379 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,1,1,3,13,25,41,95,289,1010,4113,15296,63783,305771,1708813,

%T 10377230,69118879,490255119,4001984029,36100718210,369478821921,

%U 4060660472495,50042558173907

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.0.0.0.0

%e .0.0.1.1.1.1.0.0

%e .0.1.0.1.0.0.1.0

%e .0.1.0.0.0.1.1.1

%e .1.1.1.0.0.0.1.0

%e .0.1.0.0.1.0.1.0

%e .0.0.1.1.1.1.0.0

%e .0.0.0.0.1.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)