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%I #10 Oct 02 2019 11:36:58
%S 1,1,4,626,4822394
%N Number of simple mixed arrangements of 1 pseudoline and n double pseudolines in the projective plane.
%H J. Ferte, V. Pilaud and M. Pocchiola, <a href="https://arxiv.org/abs/1009.1575">On the number of simple arrangements of five double pseudolines</a>, arXiv:1009.1575 [cs.CG], 2010; Discrete Comput. Geom. 45 (2011), 279-302.
%K nonn,more
%O 0,3
%A _N. J. A. Sloane_, Jun 20 2011
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