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A048885
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Number of nonisomorphic orthogonal arrays OA(4n,4n-1,2,2).
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4
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OFFSET
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1,4
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COMMENTS
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Equivalently, number of 3-(4*n,2*n,n-1) designs.
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REFERENCES
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A. S. Hedayat, N. J. A. Sloane and J. Stufken, Orthogonal Arrays, Springer-Verlag, NY, 1999, see Table 7.37 page 165.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,nice,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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