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A187585
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Number of Steiner Systems S(2,4,n) with nontrivial automorphism group.
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1
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 4466, 0, 0, 0, 0, 0, 0, 0, 0
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OFFSET
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1,25
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COMMENTS
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a(37) is the first unknown value.
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LINKS
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Table of n, a(n) for n=1..36.
Colin Reid and Alex Rosa, Steiner systems S(2,4,v) - a survey, Electronic Journal of Combinatorics, Dynamic Survey DS18, Feb 01 2010.
E. Spence, The complete classification of Steiner Systems S(2,4,25), J. Combin. Designs, 4 (1996), 295-300.
Index entries for sequences related to Steiner systems
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CROSSREFS
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Cf. A187567.
Sequence in context: A118067 A037217 A109075 * A228574 A007791 A294699
Adjacent sequences: A187582 A187583 A187584 * A187586 A187587 A187588
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane, Mar 11 2011
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STATUS
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approved
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