Triangle read by rows: T(n,k) is the number of 2-Motzkin paths (i.e., Motzkin paths with blue and red level steps) without red level steps on the x-axis, having length n and k level steps (0 <= k <= n).
A126222
Triangle read by rows: T(n,k) is the number of 2-Motzkin paths (i.e., Motzkin paths with blue and red level steps) without red level steps on the x-axis, having length n and k level steps (0 <= k <= n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =0a(7) =4a(8) =0a(9) =1a(10) =2a(11) =0a(12) =11a(13) =0a(14) =1a(15) =0a(16) =15a(17) =0a(18) =26a(19) =0a(20) =1a(21) =5a(22) =0a(23) =69a(24) =0a(25) =57a(26) =0a(27) =1a(28) =0a(29) =56
External references
- oeis: A126222