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Search: id:A053643
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| 0, 0, 0, 0, 0, 1, 1, 4, 10, 21, 42, 77, 132, 215, 334, 501, 728, 1032, 1428, 1938, 2584, 3392, 4389, 5609, 7084, 8855, 10964, 13455, 16380, 19793, 23751, 28319, 33563, 39556, 46376, 54106, 62832, 72650, 83657, 95960, 109668, 124900
(list; graph; listen)
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OFFSET
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1,8
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REFERENCES
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R. L. Graham and N. J. A. Sloane, Lower bounds for constant weight codes, IEEE Trans. Inform. Theory, 26 (1980), 37-43.
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MAPLE
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seq(ceil(binomial(n, 5)/6), n=0..41); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 12 2009]
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CROSSREFS
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Cf. A053618.
Sequence in context: A121497 A132925 A166553 this_sequence A111927 A109885 A054211
Adjacent sequences: A053640 A053641 A053642 this_sequence A053644 A053645 A053646
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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), Mar 25 2000
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