Number of linear chord diagrams having n chords and no chord length larger than three.
A293995
Number of linear chord diagrams having n chords and no chord length larger than three.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =35a(5) =103a(6) =343a(7) =979a(8) =2915a(9) =8935a(10) =26559a(11) =79499a(12) =239547a(13) =717455a(14) =2151095a(15) =6459027a(16) =19371507a(17) =58106071a(18) =174349295a(19) =523022555a(20) =1569013931a(21) =4707208351a(22) =14121515303a(23) =42364215075a(24) =127093528675a(25) =381280144743
External references
- oeis: A293995