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A146939
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1111-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 8, 13, 24, 41, 98, 229, 673, 1711, 5548, 16018, 61606, 212821, 953199, 3714584, 18906725, 85353129, 504635142, 2652064148, 18219772927, 110274034707, 872419840249, 6103743292627, 55838534314788
(list; graph; refs; listen; history; internal format)
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