Edge-rooted tree-like octagonal systems (see the Cyvin et al. reference for precise definition).
A121112
Edge-rooted tree-like octagonal systems (see the Cyvin et al. reference for precise definition).
Terms
- a(0) =0a(1) =5a(2) =25a(3) =155a(4) =1080a(5) =8085a(6) =63525a(7) =516790a(8) =4315805a(9) =36786385a(10) =318736105a(11) =2799049985a(12) =24857641900a(13) =222861398060
External references
- oeis: A121112