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%I #5 Mar 30 2012 18:40:59
%S 1,4,2,9,0,0,6,1,5
%N Constant arising in lattice coverings of Nil space by congruent geodesic balls.
%C The Nil geometry is one of the eight 3-dimensional Thurston geometries, which can be derived from W. Heisenberg's real matrix group.
%H Jeno Szirmai, <a href="http://arxiv.org/abs/1105.1986">On lattice coverings of Nil space by congruent geodesic balls</a>, May 10, 2011.
%e Approximately 1.42900615.
%K nonn,cons
%O 1,2
%A _Jonathan Vos Post_, May 10 2011