Number of (2*n)Xn binary matrices with all row sums equal and all column sums equal.
A181234
Number of (2*n)Xn binary matrices with all row sums equal and all column sums equal.
Terms
- a(0) =2a(1) =8a(2) =182a(3) =49772a(4) =113400002
External references
- oeis: A181234