Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords contain the marked chord.
A336600
Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords contain the marked chord.
Terms
- a(0) =1a(1) =5a(2) =1a(3) =32a(4) =11a(5) =2a(6) =260a(7) =116a(8) =38a(9) =6a(10) =2589a(11) =1344a(12) =594a(13) =174a(14) =24a(15) =30669a(16) =17529a(17) =9294a(18) =3774a(19) =984a(20) =120a(21) =422232a(22) =257487a(23) =153852a(24) =76782a(25) =28272a(26) =6600a(27) =720a(28) =6633360a(29) =4234320
External references
- oeis: A336600