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).

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

Offset

0,7

Links

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

Patric R. J. Östergård, 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