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Search: id:A030128
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| A030128 |
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Steiner triple systems (STS's) on n elements. |
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+0
7
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| 1, 0, 1, 0, 0, 0, 30, 0, 840, 0, 0, 0, 1197504000, 0, 60281712691200, 0, 0, 0, 1348410350618155344199680000
(list; graph; listen)
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OFFSET
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1,7
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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
Index entries for sequences related to Steiner systems
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CROSSREFS
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Cf. A001201, A030129, A051390.
Sequence in context: A124992 A023926 A022068 this_sequence A137348 A137737 A062513
Adjacent sequences: A030125 A030126 A030127 this_sequence A030129 A030130 A030131
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KEYWORD
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nonn,nice,hard
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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