%I A019999
%S A019999 4,36,384,4800,69120,1128960,20643840,418037760,9289728000,
%T A019999 224811417600,5885971660800,165788201779200,4999151930572800,
%U A019999 160687026339840000,5484783832399872000,198137815945445376000
%N A019999 Number of similarity classes of descendants created by bisection refinement 
               from an initial n-simplex.
%D A019999 J. M. Maubach: The amount of similarity classes created by local n-simplicial 
               bisection refinement, 1996.
%D A019999 J. M. Maubach, Local bisection refinement for n-simplicial grids generated 
               by reflections, SIAM J. Scientific Computing, 16(1995), 210-227.
%F A019999 n*n!*2^(n-2).
%Y A019999 Sequence in context: A026334 A163455 A138736 this_sequence A002894 A131765 
               A132864
%Y A019999 Adjacent sequences: A019996 A019997 A019998 this_sequence A020000 A020001 
               A020002
%K A019999 nonn
%O A019999 0,1
%A A019999 Joseph Maria Maubach (maubach(AT)una25.math.pitt.edu)