Triangle read by rows: T(n,k) is the number of 3-noncrossing RNA structures on n vertices having k isolated vertices.

A187253

Triangle read by rows: T(n,k) is the number of 3-noncrossing RNA structures on n vertices having k isolated vertices.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =1a(6) =0a(7) =1a(8) =0a(9) =1a(10) =1a(11) =0a(12) =3a(13) =0a(14) =1a(15) =0a(16) =6a(17) =0a(18) =6a(19) =0a(20) =1a(21) =4a(22) =0a(23) =21a(24) =0a(25) =10a(26) =0a(27) =1a(28) =0a(29) =34

External references