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A013579
Number of inequivalent Mendelsohn triple systems (MTS(n,1)) of order n and index 1.
1
0, 0, 1, 1, 0, 0, 3, 0, 18, 143
OFFSET
1,7
REFERENCES
C. J. Colbourn and J. H. Dinitz, 2007. The Handbook of Combinatorial Designs, 2nd edition, CRC Press, Boca Raton (FL).
C. J. Colbourn and A. Rosa, 1999. Triple systems, Claredon Press, Oxford.
C. J. Colbourn and A. Rosa, "Directed and Mendelsohn triple systems", in: Contemporary Design Theory: A Collection of Surveys (Ed. J. H. Dinitz and D. R. Stinson), pp. 97-136, John Wiley & Sons, New York, 1992.
E. Mendelsohn, "Mendelsohn Designs", Chapter IV.28 of The CRC Handbook of Combinatorial Designs (Ed. J. H. Dinitz and C. J. Colbourn), pp. 388-393, CRC Press, Boca Raton, 1996.
CROSSREFS
Sequence in context: A057398 A361455 A373713 * A151814 A187804 A281554
KEYWORD
nonn,more,hard
AUTHOR
EXTENSIONS
a(10) corrected by Martin Kidd, Jul 01 2009, based on the value given by Colbourn and Rosa, 1999 and Colbourn and Dinizt, 2007.
STATUS
approved