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Search: id:A075927
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| 7, 25, 42, 75, 385, 642, 1155, 2184, 4233, 8330, 16523, 98305, 163842, 294915, 557064, 1081353, 2129930, 4227083, 8421504, 16810113, 33587330, 67141763, 134250632, 268468361, 536903818, 1073774731, 6442450945, 10737418242
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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J. H. Conway and N. J. A. Sloane, Lexicographic codes: error-correcting codes from game theory, IEEE Transactions on Information Theory, 32:337-348, 1986.
R. W. Hamming, Error Detecting and Error Correcting Codes, Bell System Tech. J., Vol. 29, April, 1950, pp. 147-160.
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LINKS
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Ari Trachtenberg, Error-Correcting Codes on Graphs: Lexicodes, Trellises and Factor Graphs
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FORMULA
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a(n) = b(2^n), where b is the Hamming code d=3.
b(n) = XOR(a(i)) where i is a bit set in n.
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CROSSREFS
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Cf. A075928, A075929, A075930, A075926, A057716, A075933.
Sequence in context: A110081 A140716 A141393 this_sequence A119617 A102027 A031294
Adjacent sequences: A075924 A075925 A075926 this_sequence A075928 A075929 A075930
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KEYWORD
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nonn,easy
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AUTHOR
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Bob Jenkins (bob_jenkins(AT)burtleburtle.net)
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