

A238305


Triangle E(n,k), 1<=k<=n, giving the cardinality of optimal ternary covering codes of empty spheres of length n and radius k


3



2, 3, 3, 6, 4, 5, 14, 6, 5, 8, 27, 12, 6, 7, 12
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OFFSET

1,1


COMMENTS

The next term is in the range 7181.
Right diagonal is equal to A086676.


LINKS



EXAMPLE

Triangle starts:
01: 2
02: 3 3
03: 6 4 5
04: 14 6 5 8
05: 27 12 6 7 12
...


CROSSREFS

Related to A060439, which has a code consisting of filled spheres instead of empty spheres.
Related to A230014, the triangle giving the cardinality of optimal binary covering codes of empty spheres.


KEYWORD



AUTHOR



STATUS

approved



