a(n)/n! is the expected number of left-to-right maxima in the lexicographical or colexicographical ordering of all the 3-subsets of [n] under a random permutation of [n], when the 3-subsets hold the worst order of ranks.
A308860
a(n)/n! is the expected number of left-to-right maxima in the lexicographical or colexicographical ordering of all the 3-subsets of [n] under a random permutation of [n], when the 3-subsets hold the worst order of ranks.
Terms
- a(0) =0a(1) =0a(2) =6a(3) =50a(4) =379a(5) =3023a(6) =26193a(7) =248092a(8) =2565080a(9) =28836332a(10) =350847628a(11) =4598548392a(12) =64645657608a(13) =970762440048
External references
- oeis: A308860