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A019999
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Number of similarity classes of descendants created by bisection refinement from an initial n-simplex.
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0
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4, 36, 384, 4800, 69120, 1128960, 20643840, 418037760, 9289728000, 224811417600, 5885971660800, 165788201779200, 4999151930572800, 160687026339840000, 5484783832399872000, 198137815945445376000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| J. M. Maubach: The amount of similarity classes created by local n-simplicial bisection refinement, 1996.
J. M. Maubach, Local bisection refinement for n-simplicial grids generated by reflections, SIAM J. Scientific Computing, 16(1995), 210-227.
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FORMULA
| n*n!*2^(n-2).
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CROSSREFS
| Sequence in context: A163455 A138736 A198638 * A002894 A202828 A131765
Adjacent sequences: A019996 A019997 A019998 * A020000 A020001 A020002
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KEYWORD
| nonn
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AUTHOR
| Joseph Maria Maubach (maubach(AT)una25.math.pitt.edu)
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