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A019436 Size of smallest directed 1-covering code of length n with banded structure. 2
1, 2, 3, 6, 10, 18, 31, 60, 106, 196, 352 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
D. Applegate, E. M. Rains and N. J. A. Sloane, On asymmetric coverings and covering numbers, arXiv:math/0205303 [math.CO], 2002; J. Comb. Des. 11 (2003), 218-228.
CROSSREFS
Provides upper bound for A066000.
Sequence in context: A082482 A066000 A011957 * A147852 A061279 A018073
KEYWORD
nonn,hard,more,nice
AUTHOR
N. J. A. Sloane, Dec 07 2001
STATUS
approved

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)