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%I #6 Oct 19 2017 03:40:57
%S 0,1,2,9,23,68,208
%N Number of nonorientable hyperbolic 3-manifolds of cusp type 2 obtained from n ideal tetrahedra.
%H Patrick J. Callahan, Martin V. Hildebrand and Jeffrey R. Weeks, <a href="https://doi.org/10.1090/S0025-5718-99-01036-4">A census of cusped hyperbolic 3-manifolds</a>, with microfiche supplement, Math. Comp. 68 (1999), 321-332.
%Y Cf. A092304, A091319, A091108, A091218, A091145.
%K nonn,more
%O 1,3
%A _N. J. A. Sloane_, Feb 23 2004