Number of maximal chains in the poset of all n-ary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.
A378608
Number of maximal chains in the poset of all n-ary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =103a(6) =518a(7) =2868a(8) =17263a(9) =111925a(10) =775994a(11) =5719338a(12) =44592007a(13) =366259499a(14) =3157877470a(15) =28492791496a(16) =268307662047
External references
- oeis: A378608