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A185968
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a(n) = n^2*2^(n^2-1).
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2
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0, 1, 32, 2304, 524288, 419430400, 1236950581248, 13792273858822144, 590295810358705651712, 97922991388784963151200256, 63382530011411470074835160268800
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OFFSET
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0,3
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COMMENTS
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a(n) is the number of elements (ordered pairs) in all binary relations on {1,2,...,n}.
Equivalently a(n) is the number of 1's in all n X n {0,1} matrices.
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LINKS
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MATHEMATICA
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Table[n^2 *2^(n^2-1), {n, 0, 10}]
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PROG
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(PARI) for(n=0, 25, print1(n^2 *2^(n^2-1), ", ")) \\ G. C. Greubel, Jul 23 2017
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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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