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A034328
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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).
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8
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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
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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REFERENCES
| Computed by Harald Fripertinger (fripert(AT)kfunigraz.ac.at).
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LINKS
| H. Fripertinger, Isometry Classes of Codes
Index entries for sequences related to binary linear codes
Index entries for sequences related to matroids
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EXAMPLE
| 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; ...
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CROSSREFS
| Cf. A034356, A034327.
Sequence in context: A008571 A051137 A183328 * A034253 A203952 A118687
Adjacent sequences: A034325 A034326 A034327 * A034329 A034330 A034331
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KEYWORD
| nonn,tabl
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Description corrected by Harald Fripertinger, Nov 14 2007
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