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A146286
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 111-110-111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 5, 13, 29, 41, 99, 219, 653, 1719, 7125, 30115, 144385, 515791, 2502679, 10851481, 66672841, 362202203, 2693814149, 19415112859, 179313023913, 1385523385051
(list; graph; refs; listen; history; internal format)
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