Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k runs of weak ascents, with 1 <= k <= ceiling(n/2).
A372868
Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k runs of weak ascents, with 1 <= k <= ceiling(n/2).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =1a(4) =8a(5) =6a(6) =16a(7) =24a(8) =1a(9) =32a(10) =80a(11) =10a(12) =64a(13) =240a(14) =60a(15) =1a(16) =128a(17) =672a(18) =280a(19) =14a(20) =256a(21) =1792a(22) =1120a(23) =112a(24) =1a(25) =512a(26) =4608a(27) =4032a(28) =672a(29) =18
External references
- oeis: A372868