A034328 Triangle read by rows: T(n,k) = number of loopless, regular k X n-matrix matroids of dimension k (or n-matroids of rank k).

1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 6, 12, 11, 5, 1, 1, 7, 20, 26, 17, 6, 1, 1, 9, 33, 58, 52, 25, 7, 1, 1, 11, 52, 121, 146, 95, 35, 8, 1, 1, 13, 78, 240, 388, 334, 162, 47, 9, 1, 1, 15, 113, 454, 975, 1123, 710, 262, 61, 10, 1, 1, 18, 163, 835, 2365

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• tabl

Examples

			1; 1,1; 1,2,1; 1,3,3,1; 1,4,6,4,1; 1,6,12,11,5,1; 1,7,20,26,17,6,1; ...
		

References

• Computed by Harald Fripertinger (fripert(AT)kfunigraz.ac.at).

Links

• H. Fripertinger, Isometry Classes of Codes
• Index entries for sequences related to binary linear codes
• Index entries for sequences related to matroids

Crossrefs

Cf. A034356, A034327.

Extensions

Description corrected by Harald Fripertinger, Nov 14 2007