Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 3, where equivalence is defined by row and column permutations.
A000512
Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 3, where equivalence is defined by row and column permutations.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =7a(6) =16a(7) =51a(8) =224a(9) =1165a(10) =7454a(11) =56349a(12) =481309a(13) =4548786a(14) =46829325a(15) =519812910a(16) =6177695783a(17) =78190425826
External references
- oeis: A000512