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Search: id:A145957
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| A145957 |
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a zee 1,1 1,2 2,2 2,3 in any orientation. |
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| 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 23, 23, 125, 125, 821, 821, 6239, 6239, 71403, 71403, 1048093, 1048093, 19913069, 19913069, 517074745, 517074745, 17642361171, 17642361171
(list; graph; listen)
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