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%I M0032 N0393 #16 Dec 26 2021 20:34:25
%S 1,1,0,1,0,0,1,2,0,4,7,0,12,8,0,80,84,0,820,798,0,9508,11616,0,157340,
%T 139828,0,3027456,2353310
%N Number of cyclic Steiner triple systems of order 2n+1.
%D C. J. Colbourn and A. Rosa: Triple Systems, Clarendon Press (Oxford) 1999
%D J. Doyen, Problem 30, p. 504 of R. K. Guy et al., editors, Combinatorial Structures and Their Applications (Proceedings Calgary Conference Jun 1969}), Gordon and Breach, NY, 1970.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H <a href="/index/St#Steiner">Index entries for sequences related to Steiner systems</a>
%K nonn
%O 0,8
%A _N. J. A. Sloane_
%E More terms from Michael Steyer (m.steyer(AT)osram.de), Jan 27 2005
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