A076894 Number of inequivalent linear projective ternary codes of length n (i.e., with distinct columns and without zero columns). Also the number of nonisomorphic simple ternary matroids on an n-set.

1, 1, 2, 4, 7, 17, 44, 141, 581, 3464, 33269, 582005

Offset

1,3

References

M. Wild, Enumeration of binary and ternary matroids and other applications of the Brylawski-Lucas Theorem, Preprint 1693, Technische Hochschule Darmstadt, 1994.

Links

Table of n, a(n) for n=1..12.

Harald Fripertinger, T̅_nk3: Number of the isometry classes of all projective ternary (n,r)-codes for 1 <= r <= k (without zero-columns), 2016.

Crossrefs

Cf. A076834, A076893.

Sequence in context: A299293 A382348 A342538 * A047871 A290877 A103032

Adjacent sequences: A076891 A076892 A076893 * A076895 A076896 A076897

Keyword

nonn,more

Author

Marcel Wild (mwild(AT)sun.ac.za), Nov 26 2002

Extensions

a(11)-a(12) from Fripertinger's table added by Andrei Zabolotskii, Aug 27 2025

Status

approved