Number of non-crossing antichain covers of {1,...,n}.

A324167

Number of non-crossing antichain covers of {1,...,n}.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =9a(4) =67a(5) =633a(6) =6763a(7) =77766a(8) =938957a(9) =11739033a(10) =150649945a(11) =1973059212a(12) =26265513030a(13) =354344889798

External references