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A005865 The coding-theoretic function A(n,6).
(Formerly M0240)
3
1, 1, 1, 1, 1, 2, 2, 2, 4, 6, 12, 24, 32, 64, 128, 256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

Since A(n,5) = A(n+1,6), A(n,5) gives essentially the same sequence.

The next term is known only to be in the range 258-340. - Moshe Milshtein, Apr 24 2019

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 248.

F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 674.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..16.

A. E. Brouwer, Tables of general binary codes

A. E. Brouwer, J. B. Shearer, N. J. A. Sloane and W. D. Smith, New table of constant weight codes, IEEE Trans. Info. Theory 36 (1990), 1334-1380.

M. Grassl, Bounds on the minimum distance of linear codes

Moshe Milshtein, A new two-error-correcting binary code of length 16, Cryptography and Communications (2019).

Eric Weisstein's World of Mathematics, Error-Correcting Code.

Index entries for sequences related to A(n,d)

CROSSREFS

Cf. A005864, A005866, A169761, A169762.

Sequence in context: A185030 A063823 A182027 * A176051 A245257 A153988

Adjacent sequences:  A005862 A005863 A005864 * A005866 A005867 A005868

KEYWORD

nonn,hard,nice

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 16 10:03 EDT 2019. Contains 324152 sequences. (Running on oeis4.)