Number of nonisomorphic binary n X n matrices with four 1's per column under row and column permutations.
A247597
Number of nonisomorphic binary n X n matrices with four 1's per column under row and column permutations.
Terms
- a(0) =1a(1) =7a(2) =132a(3) =6178a(4) =594203a(5) =85820809a(6) =16341829155
External references
- oeis: A247597