Number of incidence matrices: n X (n+1) binary matrices under row and column permutations.
A002725
Number of incidence matrices: n X (n+1) binary matrices under row and column permutations.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =87a(4) =1053a(5) =28576a(6) =2141733a(7) =508147108a(8) =402135275365
External references
- oeis: A002725