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A162128
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Number of n X n symmetric 0..3 arrays with rows, considered as 4-ary numbers, in strictly increasing order
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1
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4, 30, 720, 53505, 12680820, 9936894780, 26516959720695, 246350237314954005, 8100725881546916639370, 954991817788505196528852930, 407790975833063512191532123109595
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OFFSET
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1,1
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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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