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A147355
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-0110-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 6, 9, 38, 25, 340, 57, 1815, 551, 17400, 8604, 372235, 122881, 11641876, 1647352, 359458545, 42868635, 13529698097, 1998622860
(list; graph; refs; listen; history; internal format)
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