Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k platforms (i.e., UHD, UHHD, UHHHD, ..., where U=(1,1), D=(1,-1), H=(2,0)).
A104546
Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k platforms (i.e., UHD, UHHD, UHHHD, ..., where U=(1,1), D=(1,-1), H=(2,0)).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =1a(4) =16a(5) =6a(6) =60a(7) =29a(8) =1a(9) =245a(10) =138a(11) =11a(12) =1051a(13) =670a(14) =84a(15) =1a(16) =4660a(17) =3319a(18) =562a(19) =17a(20) =21174a(21) =16691a(22) =3536a(23) =184a(24) =1a(25) =98072a(26) =84864a(27) =21510a(28) =1628a(29) =24
External references
- oeis: A104546