A172662 Number of 2*n X n 0..2 arrays with row sums n and column sums 2*n.

1, 19, 5881, 115321795, 101471705778601, 5520471267708881730181, 17949532724881770551236183389177, 3781994369388530584295658367829503216546371

Offset: 1

Author

R. H. Hardin, Feb 06 2010

Keywords

• nonn

Links

• R. H. Hardin, Table of n, a(n) for n=1..10