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Search: id:A056449
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| 3, 3, 9, 9, 27, 27, 81, 81, 243, 243, 729, 729, 2187, 2187, 6561, 6561, 19683, 19683, 59049, 59049, 177147, 177147, 531441, 531441, 1594323, 1594323, 4782969, 4782969, 14348907, 14348907, 43046721, 43046721, 129140163, 129140163
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OFFSET
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1,1
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REFERENCES
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M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
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3^[n/2].
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CROSSREFS
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Cf. A000244, A016116. Essentially a duplicate of A108411.
Adjacent sequences: A056446 A056447 A056448 this_sequence A056450 A056451 A056452
Sequence in context: A147510 A146474 A145957 this_sequence A128019 A108411 A146788
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KEYWORD
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nonn,new
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AUTHOR
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Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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EXTENSIONS
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Edited by njas, Jul 03 2009 at the suggestion of Klaus Brockhaus.
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