Number of (1,0) steps in all peakless Motzkin paths of length n (can be easily translated into RNA secondary structure terminology).

A110236

Number of (1,0) steps in all peakless Motzkin paths of length n (can be easily translated into RNA secondary structure terminology).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =24a(5) =58a(6) =143a(7) =354a(8) =881a(9) =2204a(10) =5534a(11) =13940a(12) =35213a(13) =89162a(14) =226238a(15) =575114a(16) =1464382a(17) =3734150a(18) =9534594a(19) =24374230a(20) =62377881a(21) =159793932a(22) =409717004a(23) =1051405260a(24) =2700168229a(25) =6939388478a(26) =17845927498a(27) =45922416814a(28) =118238842174

External references