Triangle read by rows: T(n,k) = number of linear chord diagrams with n chords such that every chord has length at least k (1 <= k <= n).

A293157

Triangle read by rows: T(n,k) = number of linear chord diagrams with n chords such that every chord has length at least k (1 <= k <= n).

Terms

    a(0) =1a(1) =3a(2) =1a(3) =15a(4) =5a(5) =1a(6) =105a(7) =36a(8) =10a(9) =1a(10) =945a(11) =329a(12) =99a(13) =20a(14) =1a(15) =10395a(16) =3655a(17) =1146a(18) =292a(19) =40a(20) =1a(21) =135135a(22) =47844a(23) =15422a(24) =4317a(25) =876a(26) =80a(27) =1a(28) =2027025a(29) =721315

External references