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A146044
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.
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0
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1, 1, 1, 1, 1, 7, 15, 37, 79, 277, 1211, 6171, 28503, 152765, 945077, 7764777, 66517839, 667569119, 7061433273, 91063498499, 1300158727279, 22513920414055
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OFFSET
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1,6
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.0.0.0.1.0.0
.0.0.0.0.1.1.0.0
.1.1.1.1.0.1.0.0
.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0
.0.0.1.0.1.1.1.1
.0.0.1.1.0.0.0.0
.0.0.1.0.0.0.0.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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