Number of irreducible nonpositively curved triangulations of an n-gon: All internal vertices have at valence at least 6 and no diagonals of the n-gon are allowed.
A060050
Number of irreducible nonpositively curved triangulations of an n-gon: All internal vertices have at valence at least 6 and no diagonals of the n-gon are allowed.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =0a(4) =1a(5) =1a(6) =5a(7) =13a(8) =46a(9) =155a(10) =561a(11) =2068a(12) =7871a(13) =30586a(14) =121391a(15) =490196a(16) =2011422a(17) =8370698a(18) =35285987a(19) =150485667a(20) =648653910a(21) =2823402675a(22) =12400659846a(23) =54920758496a(24) =245126368841
External references
- oeis: A060050