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A076892
Number of inequivalent ternary linear codes of length n. Also the number of nonisomorphic ternary matroids on an n-set.
0
2, 4, 8, 17, 36, 85, 216, 640, 2292, 9665, 80836, 1070709, 27652010, 1345914266, 115596164732
OFFSET
1,1
REFERENCES
M. Wild, Enumeration of binary and ternary matroids and other applications of the Brylawski-Lucas theorem, Technische Hochschule Darmstadt, Preprint 1693, 1994
EXAMPLE
The two linear ternary codes of length 3, {(0,0,0), (1,-1,0), (-1,1,0) } and {(0,0,0), (-1,0,-1), (1,0,1) } are equivalent because the latter arises from the former by changing the sign of the first component of every codeword and switching the second with the third component.
CROSSREFS
Cf. A076766.
Sequence in context: A137255 A247298 A325928 * A106462 A129987 A132275
KEYWORD
nonn,more
AUTHOR
Marcel Wild (mwild(AT)sun.ac.za), Nov 26 2002
EXTENSIONS
a(9) corrected by Gordon Royle, Oct 27 2007
STATUS
approved