A034204 Number of binary codes (not necessarily linear) of length n with 9 words.

0, 0, 0, 56, 9013, 681474, 33297380, 1245930065, 38921113842, 1063289204514, 26089682147964, 584494025830394, 12087696271833266, 232582740271181155, 4188958906389785259, 70966356151034388909, 1135537418173238330558, 17222401475699072188275

Offset

1,4

Links

Table of n, a(n) for n=1..18.

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: A082167 A006690 A202922 * A275921 A091546 A059989

Adjacent sequences: A034201 A034202 A034203 * A034205 A034206 A034207

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

More terms from Sean A. Irvine, Aug 07 2020

Status

approved