Number of inequivalent 3 X 3 matrices with entries in {1,2,3,..,n} up to row permutations.
A282612
Number of inequivalent 3 X 3 matrices with entries in {1,2,3,..,n} up to row permutations.
Terms
- a(0) =0a(1) =1a(2) =120a(3) =3654a(4) =45760a(5) =333375a(6) =1703016a(7) =6784540a(8) =22500864a(9) =64836045a(10) =167167000a(11) =393877506a(12) =861456960a(13) =1769830699a(14) =3447273480a(15) =6412923000a(16) =11461636096a(17) =19776716505a(18) =33076889784a(19) =53804808190a(20) =85365336000a(21) =132422893911a(22) =201268229800a(23) =300266132244a(24) =440396812800
External references
- oeis: A282612