A034238 Number of quaternary codes of length 7 with n words.

1, 1, 7, 87, 6429, 2303283, 2479201432, 3874477609666, 6599430028972418, 11005421717482468773, 17273734529317171068203, 25181456057693008339763059, 34003737003435994894150148682

Offset

0,3

Comments

a(4^7)=1 is the last term. - Sean A. Irvine, Aug 08 2020

Links

Table of n, a(n) for n=0..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: A303061 A007803 A034219 * A132486 A297547 A183486

Adjacent sequences: A034235 A034236 A034237 * A034239 A034240 A034241

Keyword

nonn,fini

Author

N. J. A. Sloane.

Status

approved