Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations.
A260331
Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations.
Terms
- a(0) =1a(1) =2a(2) =280a(3) =277200a(4) =1009008000
External references
- oeis: A260331