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A060439 Triangle T(n,k), 1 <= k <= n, giving maximal size of ternary code of length n and covering radius k. 4
1, 3, 1, 5, 3, 1, 9, 3, 3, 1, 27, 8, 3, 3, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Next term, T(6,1), is in range 71-73. - Kamiel P.F. Verstraten, Jun 29 2015

REFERENCES

G. D. Cohen et al., Covering Codes, North-Holland, 1997, p. 174.

LINKS

Table of n, a(n) for n=1..15.

W. Haas, Binary and ternary codes of covering radius one: some new lower bounds, Discrete Math., 245 (2002), 161-178.

Index entries for sequences related to covering codes

EXAMPLE

Triangle starts:

1;

3,1;

5,3,1;

9,3,3,1;

...

CROSSREFS

First column gives A004044. Cf. A060438, A060440.

Sequence in context: A102662 A142048 A117563 * A206283 A135224 A209578

Adjacent sequences:  A060436 A060437 A060438 * A060440 A060441 A060442

KEYWORD

nonn,tabl,nice,more

AUTHOR

N. J. A. Sloane, Apr 07 2001

STATUS

approved

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Last modified March 23 18:13 EDT 2019. Contains 321433 sequences. (Running on oeis4.)