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A011826
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f-vectors for simplicial complexes of dimension at most 1 (graphs) on at most n-1 vertices.
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2
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2, 3, 5, 9, 16, 27, 43, 65, 94, 131, 177, 233, 300, 379, 471, 577, 698, 835, 989, 1161, 1352, 1563, 1795, 2049, 2326, 2627, 2953, 3305, 3684, 4091, 4527, 4993, 5490, 6019, 6581, 7177, 7808, 8475, 9179, 9921, 10702, 11523, 12385, 13289
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The polynomial a(n) = (n^3 - 3n^2 + 8n + 6)/6 fits all listed terms - John W. Layman (layman(AT)math.vt.edu), Mar 13 1999
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MATHEMATICA
| a=2; s=3; lst={0, 1, s}; Do[a+=n; s+=a; AppendTo[lst, s], {n, 2, 4!, 1}]; lst+2 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), May 24 2009]
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CROSSREFS
| Sequence in context: A191701 A066726 A124642 * A119968 A017914 A137402
Adjacent sequences: A011823 A011824 A011825 * A011827 A011828 A011829
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KEYWORD
| nonn
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AUTHOR
| Svante Linusson (linusson(AT)math.kth.se)
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