Triangle read by rows: T(n,k) is the number of closed forest meander systems with 2n crossings and k components.

A380368

Triangle read by rows: T(n,k) is the number of closed forest meander systems with 2n crossings and k components.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =8a(8) =6a(9) =1a(10) =0a(11) =42a(12) =42a(13) =12a(14) =1a(15) =0a(16) =262a(17) =320a(18) =130a(19) =20a(20) =1a(21) =0a(22) =1828a(23) =2618a(24) =1360a(25) =310a(26) =30a(27) =1a(28) =0a(29) =13820

External references