Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of odd length (n>=0, k>=0).

A202845

Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of odd length (n>=0, k>=0).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =2a(8) =6a(9) =4a(10) =10a(11) =3a(12) =7a(13) =16a(14) =14a(15) =11a(16) =30a(17) =40a(18) =1a(19) =17a(20) =62a(21) =90a(22) =16a(23) =28a(24) =126a(25) =184a(26) =85a(27) =49a(28) =241a(29) =384

External references