Number of planar hexagon trees with n hexagons.
A004127
Number of planar hexagon trees with n hexagons.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =68a(5) =483a(6) =3946a(7) =34485a(8) =315810a(9) =2984570a(10) =28907970a(11) =285601251a(12) =2868869733a(13) =29227904840a(14) =301430074416
External references
- oeis: A004127