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A007174
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Number of simplicial 4-clusters with n cells.
(Formerly M2679)
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0
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1, 1, 1, 3, 7, 20, 131, 815, 5142, 36800, 272093, 2077909, 16176607, 127997683, 1025727646, 8310377815, 68217725764, 560527576100, 4556993996246
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| F. Hering et al., The enumeration of stack polytopes and simplicial clusters, Discrete Math., 40 (1982), 203-217.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A071688 A110149 A024331 * A091184 A174348 A196035
Adjacent sequences: A007171 A007172 A007173 * A007175 A007176 A007177
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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