Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n having k (1,1) steps (can be easily translated into RNA secondary structure terminology). Except for row 0, row n has ceiling(n/2) entries.
A089732
Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n having k (1,1) steps (can be easily translated into RNA secondary structure terminology). Except for row 0, row n has ceiling(n/2) entries.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =1a(8) =6a(9) =1a(10) =1a(11) =10a(12) =6a(13) =1a(14) =15a(15) =20a(16) =1a(17) =1a(18) =21a(19) =50a(20) =10a(21) =1a(22) =28a(23) =105a(24) =50a(25) =1a(26) =1a(27) =36a(28) =196a(29) =175
External references
- oeis: A089732