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A146433
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 101-111-101 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 13, 25, 49, 124, 263, 846, 2209, 7594, 21663, 81736, 275021, 1243671, 4831201, 26082779, 118314435, 731456697, 3805948133, 26532655113, 159482402665
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