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A006181 Maximal partial Steiner triple systems of order n.
(Formerly M0338)
2
1, 1, 1, 2, 2, 4, 10, 47, 472 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,4

REFERENCES

C. J. Colbourn and A. Rosa, Maximal partial Steiner triple systems of order v <= 11, Ars. Comb., 20 (1985), 5-11.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=3..11.

C. J. Colbourn and A. Rosa, Maximal partial Steiner triple systems of order v <= 11, Ars. Comb., 20 (1985), 5-11. (Annotated scanned copy)

Index entries for sequences related to Steiner systems

CROSSREFS

Sequence in context: A254400 A054100 A034165 * A173100 A092635 A270549

Adjacent sequences:  A006178 A006179 A006180 * A006182 A006183 A006184

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 17 19:58 EST 2019. Contains 319251 sequences. (Running on oeis4.)