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Search: id:A066407
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| A066407 |
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Number of orthogonal arrays OA(6,n,2,1). |
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+0
1
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| 0, 0, 2880, 109440, 2753280, 60249600, 1249274880, 25351280640, 509998510080, 10223941017600, 204671339642880, 4094969962659840, 81911756682362880, 1638334041381273600, 32767472282735738880, 655355778068620247040
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OFFSET
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1,3
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REFERENCES
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J.-Z. Zhang, Z.-S. You and Z.-L. Li, Enumeration of binary orthogonal arrays of strength 1, Discrete Math., 239 (2000), 191-198.
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FORMULA
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2^n*(10^n-15*4^n+45*2^n-40).
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CROSSREFS
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Sequence in context: A101999 A066174 A134856 this_sequence A144547 A035895 A035775
Adjacent sequences: A066404 A066405 A066406 this_sequence A066408 A066409 A066410
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Dec 25 2001
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