Number of hill-free Schroeder paths of length 2n that have no horizontal steps on the x-axis.

A114710

Number of hill-free Schroeder paths of length 2n that have no horizontal steps on the x-axis.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =6a(4) =26a(5) =114a(6) =526a(7) =2502a(8) =12194a(9) =60570a(10) =305526a(11) =1560798a(12) =8058714a(13) =41987106a(14) =220470942a(15) =1165553718a(16) =6198683090a(17) =33140219946a(18) =178012804678a(19) =960232902606

External references