Triangle read by rows: T(n,k) is number of paths in the first quadrant from (0,0) to (n,0) using steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having exactly k h-steps.
A132277
Triangle read by rows: T(n,k) is number of paths in the first quadrant from (0,0) to (n,0) using steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having exactly k h-steps.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =0a(5) =1a(6) =0a(7) =5a(8) =0a(9) =1a(10) =6a(11) =0a(12) =9a(13) =0a(14) =1a(15) =0a(16) =25a(17) =0a(18) =14a(19) =0a(20) =1a(21) =22a(22) =0a(23) =66a(24) =0a(25) =20a(26) =0a(27) =1a(28) =0a(29) =129
External references
- oeis: A132277