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%I #18 Dec 30 2018 16:45:00
%S 3,61,1936,89986,4791784,272005507,15929826713,951610091294,
%T 57659992554993,3532378891197016,218331197907776846,
%U 13594369669588615612
%N Number of 6-regular maps with n vertices on the torus, up to orientation-preserving and orientation-reversing isomorphisms.
%H E. Krasko, A. Omelchenko, <a href="https://arxiv.org/abs/1709.03230">Enumeration of r-regular Maps on the Torus. Part II: Enumeration of Unsensed Maps</a>, arXiv preprint arXiv:1709.03230 [math.CO], 2017. See Table 1, p. 20.
%H E. Krasko, A. Omelchenko, <a href="https://doi.org/10.1016/j.disc.2018.09.004">Enumeration of r-regular maps on the torus. Part II: Unsensed maps</a>, Discrete Mathematics, Volume 342, Issue 2, February 2019, pp. 600-614.
%Y Cf. A292405, A292408, A292468, A292109.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Sep 20 2017
%E a(11)-a(12) from _Evgeniy Krasko_, Sep 27 2017
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