Number of matroids: column 4 of A034327.

A034330

Number of matroids: column 4 of A034327.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =3a(6) =9a(7) =24a(8) =60a(9) =133a(10) =279a(11) =556

External references