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A141049
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Number of n X n binary matrices, symmetric under 180 degree rotation, with rows, considered as binary numbers, in strictly increasing order.
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0
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1, 2, 3, 32, 138, 4080, 59524, 4687776, 225124336, 51271450616, 8343603385400, 5906858359525200, 3340333500963917624, 7785349019265044794432
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OFFSET
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2,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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