%I #7 Oct 01 2016 17:10:13
%S 1,1,1,3,4,12,16,48,64,210,276,947,1252,4510,6028,22406,30364,116506
%N Number of permutation symbols of type a(n) for hyperbolic archimedean tessellations of rank n.
%C See Conway et al. for precise definition.
%D J. H. Conway et al., The Symmetries of Things, Peters, 2008, p. 261.
%Y Bisections: A142872, A142873.
%K nonn,more
%O 1,4
%A _N. J. A. Sloane_, Oct 03 2008