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A034238 Number of quaternary codes of length 7 with n words. 0
1, 1, 7, 87, 6429, 2303283, 2479201432, 3874477609666, 6599430028972418, 11005421717482468773, 17273734529317171068203, 25181456057693008339763059, 34003737003435994894150148682 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 22 18:56 EDT 2021. Contains 347608 sequences. (Running on oeis4.)