Triangle read by rows: T(n,k) is the number of lattice paths from (0,0) to (n,n) using steps E=(1,0), N=(0,1) and D=(1,1) (i.e., bilateral Schroeder paths), having k D=(1,1) steps.
A104684
Triangle read by rows: T(n,k) is the number of lattice paths from (0,0) to (n,n) using steps E=(1,0), N=(0,1) and D=(1,1) (i.e., bilateral Schroeder paths), having k D=(1,1) steps.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =6a(4) =6a(5) =1a(6) =20a(7) =30a(8) =12a(9) =1a(10) =70a(11) =140a(12) =90a(13) =20a(14) =1a(15) =252a(16) =630a(17) =560a(18) =210a(19) =30a(20) =1a(21) =924a(22) =2772a(23) =3150a(24) =1680a(25) =420a(26) =42a(27) =1a(28) =3432a(29) =12012
External references
- oeis: A104684