Triangle read by rows: T(n,m) is the number of inequivalent n X m matrices under action of the Klein group, with a sixth of 1s, 2s, 3s, 4s, 5s and 6s (ordered occurrences rounded up/down if n*m != 0 mod 6).
A287022
Triangle read by rows: T(n,m) is the number of inequivalent n X m matrices under action of the Klein group, with a sixth of 1s, 2s, 3s, 4s, 5s and 6s (ordered occurrences rounded up/down if n*m != 0 mod 6).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =180a(9) =11358a(10) =1a(11) =1a(12) =2520a(13) =1872000a(14) =1009008000a(15) =1a(16) =1a(17) =56712a(18) =189197280a(19) =814774020480a(21) =1a(22) =360a(23) =1871640a(24) =34306401600
External references
- oeis: A287022