a(n) is the number of n X n binary matrices (over the reals) with at least one row and column full of 1's where the row index equals the column index.
A307248
a(n) is the number of n X n binary matrices (over the reals) with at least one row and column full of 1's where the row index equals the column index.
Terms
- a(0) =1a(1) =3a(2) =43a(3) =1959a(4) =322711a(5) =200353563a(6) =480333970243
External references
- oeis: A307248