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A192894 Number of symmetric 13-ary factorizations of the n-cycle (12...n). 2


%S 1,1,7,13,112,247,2310,5525,53998,135408

%N Number of symmetric 13-ary factorizations of the n-cycle (12...n).

%C The six sequences displayed in Table 1 of the Bousquet-Lamathe reference are A047749, A143546, A143547, A143554, A192893, A192894. From this one should be able to guess a g.f.

%H Michel Bousquet and C├ędric Lamathe, <a href="http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/view/1003">On symmetric structures of order two</a>, Discrete Math. Theor. Comput. Sci. 10 (2008), 153-176. See Table 1.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Jul 12 2011

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Last modified June 21 19:59 EDT 2021. Contains 345365 sequences. (Running on oeis4.)