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A050142 Square array T(n,k) giving maximal numbers of codewords in mixed code with n binary coordinates and k ternary coordinates with Hamming distance 3, read by antidiagonals (n >= 0, k >= 0). 11
1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 2, 3, 4, 6, 9, 4, 6, 6, 9, 12, 18, 8, 8, 12, 18, 22, 33, 38, 16, 16, 22, 28, 42 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

Table of n, a(n) for n=0..32.

P. R. J. Ostergard, Classification of small binary/ternary one-error-correcting codes (Appendix), Discrete Mathematics 223 (2000), 253-262.

EXAMPLE

Array begins:

1 1 1 3 9 ...

1 1 2 6 12 ...

1 2 4 9 22 ...

2 3 6 18 42 ...

CROSSREFS

Rows and columns give A057574-A057584.

Sequence in context: A058769 A194312 A116997 * A092964 A183368 A156862

Adjacent sequences:  A050139 A050140 A050141 * A050143 A050144 A050145

KEYWORD

nonn,tabl,more

AUTHOR

N. J. A. Sloane, Oct 05 2000

STATUS

approved

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Last modified January 19 03:54 EST 2020. Contains 331031 sequences. (Running on oeis4.)