Forests of binary shrubs on 3n vertices avoiding 321.
A257995
Forests of binary shrubs on 3n vertices avoiding 321.
Terms
- a(0) =1a(1) =2a(2) =37a(3) =866a(4) =23285a(5) =679606a(6) =20931998a(7) =669688835a(8) =22040134327a(9) =741386199872
External references
- oeis: A257995