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A075927
Basis for code in A075926.
2
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
OFFSET
0,1
LINKS
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.
FORMULA
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.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Bob Jenkins (bob_jenkins(AT)burtleburtle.net)
STATUS
approved