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A146926
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111-1001 pattern in any orientation.
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0
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1, 1, 1, 3, 3, 5, 9, 17, 89, 140, 1134, 2523, 20495, 73514, 534008, 1996987, 23508472, 92663083, 1862869380, 7762461636, 266742576438, 1312733745392, 59491047519251, 367850100364195, 19425750984998415, 144916187683650857
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