Number of 2*n X 6 binary arrays with row sums 3 and column sums n.
A172556
Number of 2*n X 6 binary arrays with row sums 3 and column sums n.
Terms
- a(0) =1a(1) =20a(2) =1860a(3) =297200a(4) =60871300a(5) =14367744720
External references
- oeis: A172556