A034241 Number of quaternary codes (not necessarily linear) of length n with 4 words.

1, 10, 55, 223, 759, 2309, 6429, 16674, 40719, 94344, 208619, 442442

Offset

1,2

Links

Table of n, a(n) for n=1..12.

H. Fripertinger, Isometry Classes of Codes

H. Fripertinger, Enumeration, construction and random generation of block codes, Designs, Codes, Crypt., 14 (1998), 213-219.

Crossrefs

Cf. A034188-.

Sequence in context: A243744 A145459 A290893 * A341223 A337631 A249460

Adjacent sequences: A034238 A034239 A034240 * A034242 A034243 A034244

Keyword

nonn,more

Author

N. J. A. Sloane.

Extensions

a(10)-a(12) from Sean A. Irvine, Aug 09 2020

Status

approved