Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of even length (n>=0, k>=0).
A202848
Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of even length (n>=0, k>=0).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =7a(6) =1a(7) =14a(8) =3a(9) =31a(10) =6a(11) =66a(12) =16a(13) =141a(14) =44a(15) =313a(16) =107a(17) =3a(18) =702a(19) =262a(20) =14a(21) =1577a(22) =663a(23) =43a(24) =3581a(25) =1654a(26) =138a(27) =8207a(28) =4091a(29) =436
External references
- oeis: A202848