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Search: id:A030129
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| A030129 |
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Number of nonisomorphic Steiner triple systems (STS's) S(2,3,n) on n points. |
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+0
8
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| 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0, 80, 0, 0, 0, 11084874829
(list; graph; listen)
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OFFSET
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1,13
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 304.
CRC Handbook of Combinatorial Designs, 1996, p. 70.
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LINKS
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P. Kaski and P. R. J. \"Osterg{\aa}rd (Patric.Ostergard(AT)hut.fi), The Steiner triple systems of order 19
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences related to Steiner systems
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CROSSREFS
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Cf. A001201, A030128, A051390, A124118, A124119.
Sequence in context: A012694 A098276 A013553 this_sequence A012647 A012334 A012451
Adjacent sequences: A030126 A030127 A030128 this_sequence A030130 A030131 A030132
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KEYWORD
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nonn,nice,hard
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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