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Search: id:A006611
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| A006611 |
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Number of n-node forests not determined by their spectra.
(Formerly M1273)
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+0
1
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| 0, 0, 0, 0, 0, 2, 4, 14, 38, 89, 234, 579, 1466
(list; graph; listen)
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OFFSET
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1,6
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
C. Godsil and B. D. McKay, Some computational results on the spectra of graphs, pp. 73-92 of Combinatorial Mathematics IV (Adelaide 1975), Lect. Notes Math., 560 (1976).
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CROSSREFS
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Sequence in context: A000622 A088028 A135960 this_sequence A007462 A053623 A035010
Adjacent sequences: A006608 A006609 A006610 this_sequence A006612 A006613 A006614
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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