Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k H steps (0<=k<=floor(n/2)).
A132280
Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k H steps (0<=k<=floor(n/2)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =2a(6) =9a(7) =6a(8) =1a(9) =21a(10) =16a(11) =3a(12) =51a(13) =45a(14) =12a(15) =1a(16) =127a(17) =126a(18) =40a(19) =4a(20) =323a(21) =357a(22) =135a(23) =20a(24) =1a(25) =835a(26) =1016a(27) =441a(28) =80a(29) =5
External references
- oeis: A132280