Number T(n,k) of ascent sequences of length n with exactly k flat steps; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
A242153
Number T(n,k) of ascent sequences of length n with exactly k flat steps; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =2a(7) =2a(8) =1a(9) =0a(10) =5a(11) =6a(12) =3a(13) =1a(14) =0a(15) =16a(16) =20a(17) =12a(18) =4a(19) =1a(20) =0a(21) =61a(22) =80a(23) =50a(24) =20a(25) =5a(26) =1a(27) =0a(28) =271a(29) =366
External references
- oeis: A242153