Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations whose associated reading permutation avoids 231 in the classical sense.
A260332
Labelings of n diamond-shaped posets with 4 vertices per diamond where the labels follow the poset relations whose associated reading permutation avoids 231 in the classical sense.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =226a(4) =3298a(5) =52450a(6) =881970
External references
- oeis: A260332