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A007149
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2-part of number of graphs on n nodes.
(Formerly M0017)
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1
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0, 0, 1, 2, 0, 1, 2, 2, 1, 2, 4, 3, 4, 4, 5, 5, 4, 5, 8, 6, 8, 7, 8, 8, 9, 9, 10, 10, 15, 11, 12, 12, 11, 12, 16, 13, 16, 14, 15, 15, 17, 16, 17, 17, 19, 18, 19, 19, 20, 20, 21, 21, 23, 22, 23, 23
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| Steven C. Cater and Robert W. Robinson, "Exponents of 2 in the numbers of unlabeled graphs and tournaments," Congressus Numerantium, 82 (1991), pp. 139-155.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Power of 2 dividing A000088.
Sequence in context: A065051 A084665 A035392 * A028832 A199331 A033773
Adjacent sequences: A007146 A007147 A007148 * A007150 A007151 A007152
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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