Number of nX6 arrays of permutations of 6 copies of 0..n-1 with rows and columns nondecreasing.
A265003
Number of nX6 arrays of permutations of 6 copies of 0..n-1 with rows and columns nondecreasing.
Terms
- a(0) =1a(1) =4a(2) =41a(3) =846a(4) =27000a(5) =1268728a(6) =76714325a(7) =5732148226a(8) =507120480166
External references
- oeis: A265003