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A187585 Number of Steiner Systems S(2,4,n) with nontrivial automorphism group. 1

%I

%S 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,

%T 0,0,0,0

%N Number of Steiner Systems S(2,4,n) with nontrivial automorphism group.

%C a(37) is the first unknown value.

%D Colin Reid and Alex Rosa, Steiner systems S(2,4,v) - a survey, Electronic Journal of Combinatorics, Dynamic Survey DS18, Feb 01 2010.

%D E. Spence, The complete classification of Steiner Systems S(2,4,25), J. Combin. Designs, 4 (1996), 295-300.

%H <a href="/index/St#Steiner">Index entries for sequences related to Steiner systems</a>

%Y Cf. A187567.

%K nonn,more

%O 1,25

%A _N. J. A. Sloane_, Mar 11 2011

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Last modified August 20 06:54 EDT 2018. Contains 313909 sequences. (Running on oeis4.)