Number of 3*n X 3 0..2 arrays with row sums 2 and column sums 2*n.

A172675

Number of 3*n X 3 0..2 arrays with row sums 2 and column sums 2*n.

Terms

    a(0) =21a(1) =2385a(2) =352128a(3) =57775905a(4) =10060071021

External references