Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.
A265231
Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.
Terms
- a(0) =1a(1) =8a(2) =495a(3) =184740a(4) =164933040a(5) =277778385204
External references
- oeis: A265231