Number of nonisomorphic simple matroids of rank 3 on n unlabeled points.

A058731

Number of nonisomorphic simple matroids of rank 3 on n unlabeled points.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =9a(7) =23a(8) =68a(9) =383a(10) =5249a(11) =232928a(12) =28872972

External references