Triangle read by rows: T(n,k) is the total number of bubbles of size k found in linear chord diagrams on 2n vertices.

A367000

Triangle read by rows: T(n,k) is the total number of bubbles of size k found in linear chord diagrams on 2n vertices.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =0a(4) =0a(5) =1a(6) =8a(7) =4a(8) =2a(9) =2a(10) =0a(11) =5a(12) =42a(13) =30a(14) =20a(15) =15a(16) =12a(17) =10a(18) =0a(19) =36a(20) =300a(21) =240a(22) =186a(23) =147a(24) =120a(25) =99a(26) =82a(27) =72a(28) =0a(29) =329

External references