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 are contained within the marked chord.
A336599
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 are contained within the marked chord.
Terms
- a(0) =1a(1) =5a(2) =1a(3) =33a(4) =9a(5) =3a(6) =279a(7) =87a(8) =39a(9) =15a(10) =2895a(11) =975a(12) =495a(13) =255a(14) =105a(15) =35685a(16) =12645a(17) =6885a(18) =4005a(19) =2205a(20) =945a(21) =509985a(22) =187425a(23) =106785a(24) =66465a(25) =41265a(26) =23625a(27) =10395a(28) =8294895a(29) =3133935
External references
- oeis: A336599