Length of longest chain of nonempty proper inverse subsemigroups of the dual symmetric inverse monoid.

A262296

Length of longest chain of nonempty proper inverse subsemigroups of the dual symmetric inverse monoid.

Terms

    a(0) =0a(1) =2a(2) =11a(3) =49a(4) =223a(5) =1065a(6) =5337a(7) =28231a(8) =158939

External references