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A331395
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Number of nonnegative integer matrices with total sum n, nonzero rows and distinct columns each with the same sum with columns in decreasing lexicographic order.
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1
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1, 3, 5, 21, 17, 281, 65, 3209, 10853, 47617, 1025, 3610317, 4097, 22361569, 570275061, 2515267681, 65537, 229801424781, 262145, 10805763650257, 114290395025669, 39654899669089, 4194305, 150858428803209493, 140094551951590929, 98672497472409697
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OFFSET
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1,2
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COMMENTS
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The condition that the columns be in decreasing order is equivalent to considering nonequivalent matrices with distinct columns up to permutation of columns.
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LINKS
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FORMULA
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a(p) = 2^(p-1) + 1 for prime p.
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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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