Array by antidiagonals: Number of planar lattice walks of length 3n+2k starting at (0,0) and ending at (k,0), remaining in the first quadrant and using only NE,W,S steps.
A098273
Array by antidiagonals: Number of planar lattice walks of length 3n+2k starting at (0,0) and ending at (k,0), remaining in the first quadrant and using only NE,W,S steps.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =2a(4) =8a(5) =16a(6) =5a(7) =30a(8) =96a(9) =192a(10) =14a(11) =112a(12) =480a(13) =1408a(14) =2816a(15) =42a(16) =420a(17) =2240a(18) =8320a(19) =23296a(20) =46592a(21) =132a(22) =1584a(23) =10080a(24) =44800a(25) =153600a(26) =417792a(27) =835584a(28) =429a(29) =6006
External references
- oeis: A098273