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A010558 Maximal size of binary code of length n correcting 2 unidirectional errors. 0
1, 1, 1, 2, 2, 2, 4, 6, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

REFERENCES

J. H. Weber, Bounds and Constructions for Binary Block Codes Correcting Asymmetric or Unidirectional Errors, Ph. D. Thesis, Tech. Univ. Delft, 1989.

J. H. Weber, C. de Vroedt and D. E. Boekee, Bounds and constructions for binary codes of length less than 24 and asymmetric distance less than 6, IEEE Trans. Inform. Theory, 34 (1988), 1321-1332.

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A241576 A272371 A191651 * A060827 A188288 A064355

Adjacent sequences:  A010555 A010556 A010557 * A010559 A010560 A010561

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 21 04:18 EST 2019. Contains 320371 sequences. (Running on oeis4.)