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Search: id:A162028
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| A162028 |
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Number of nXn symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 2 rows or columns zero |
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1
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| 86, 393, 1319, 4133, 12139, 33357, 85798, 207283, 472758, 1023449, 2114041, 4186441, 7981693, 14705357, 26266256, 45614055, 77207792, 127655369, 206573275, 327726605, 510521919, 781939821, 1179010506, 1751954107, 2568128666
(list; graph; listen)
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