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A147881
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Number of consistent sets of 8 irreflexive binary order relationships over n objects.
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8
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3330, 750810, 31528980, 572121396, 6186026736, 47056700160, 277413461820, 1346956001820, 5610483560682, 20631960791442, 68410542640440, 207816360293880, 585602287143120, 1545890870506608, 3853704950392968, 9131773574418120, 20681704245537090, 44975479946588730
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OFFSET
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5,1
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LINKS
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FORMULA
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a(n) = (n-4)*(n-3)*(n-2)*(n-1)*n*(n^11 + 2*n^10 - 43*n^9 - 226*n^8 - 21*n^7 + 5110*n^6 + 36247*n^5 + 91954*n^4 - 612172*n^3 - 5449152*n^2 - 2743020*n + 82544280)/40320. - Vaclav Kotesovec, Apr 11 2020
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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