Number of (4*n)X4 binary matrices with all row sums equal and all column sums equal.
A181238
Number of (4*n)X4 binary matrices with all row sums equal and all column sums equal.
Terms
- a(0) =140a(1) =49772a(2) =33235358a(3) =27896484332
External references
- oeis: A181238