Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations whose associated reading permutation avoids 321 in the classical sense.

A260579

Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations whose associated reading permutation avoids 321 in the classical sense.

Terms

    a(0) =1a(1) =2a(2) =106a(3) =5976a(4) =387564a(5) =27247446a(6) =2020632046a(7) =155622020610

External references