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Orientable embedding number gamma_1 for bouquet B_n.
3

%I #5 Dec 07 2020 12:36:38

%S 2,80,3360,161280

%N Orientable embedding number gamma_1 for bouquet B_n.

%D Jonathan L. Gross and Thomas W. Tucker, Enumerating graph embeddings and partial-duals by genus and Euler genus, ECA 1:1 (2021) Article S2S1. See Table 1.

%D J. L. Gross and J. Yellen, eds., Handbook of Graph Theory, CRC Press, 2004; p. 649.

%Y A column of A123850.

%K nonn,more

%O 2,1

%A _N. J. A. Sloane_, Nov 19 2006