Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.

A058194

Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.

Terms

    a(0) =1a(1) =3a(2) =21a(3) =162a(4) =1636a(5) =19977a(6) =298416a(7) =5300296a(8) =110219750a(9) =2639842989a(10) =71859429837

External references