Triangle T(n,k) read by rows: T(n,k) is the number of length-n ascent sequences with exactly k descents.
A238858
Triangle T(n,k) read by rows: T(n,k) is the number of length-n ascent sequences with exactly k descents.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =2a(4) =0a(5) =0a(6) =4a(7) =1a(8) =0a(9) =0a(10) =8a(11) =7a(12) =0a(13) =0a(14) =0a(15) =16a(16) =33a(17) =4a(18) =0a(19) =0a(20) =0a(21) =32a(22) =131a(23) =53a(24) =1a(25) =0a(26) =0a(27) =0a(28) =64a(29) =473
External references
- oeis: A238858