login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A034253 Triangle read by rows: T(n,k) = number of inequivalent linear [n,k] binary codes without 0 columns (n >= 1, 1 <= k <= n). 34
1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 6, 12, 11, 5, 1, 1, 7, 21, 27, 17, 6, 1, 1, 9, 34, 63, 54, 25, 7, 1, 1, 11, 54, 134, 163, 99, 35, 8, 1, 1, 13, 82, 276, 465, 385, 170, 47, 9, 1, 1, 15, 120, 544, 1283, 1472, 847, 277, 61, 10, 1, 1, 18, 174, 1048, 3480 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

REFERENCES

H. Fripertinger and A. Kerber, in AAECC-11, Lect. Notes Comp. Sci. 948 (1995), 194-204.

LINKS

Table of n, a(n) for n=1..71.

H. Fripertinger, Isometry Classes of Codes

EXAMPLE

1;

1 1;

1 2 1;

1 3 3 1;

1 4 6 4 1;

1 6 12 11 5 1;

...

CROSSREFS

Cf. A034254.

Sequence in context: A051137 A183328 A034328 * A203952 A296115 A118687

Adjacent sequences:  A034250 A034251 A034252 * A034254 A034255 A034256

KEYWORD

tabl,nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 23 05:03 EDT 2019. Contains 323508 sequences. (Running on oeis4.)