A127832 Array T by antidiagonals: for h>=0 and k>=0, T(h,k)=number of UR paths from (0,0) to (h,k) that touch the line y=2x/3 only at lattice points. A UR path is a path of steps of length 1 each directed up or right.
0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 2, 1, 1, 4, 5, 4, 3, 1, 1, 5, 9, 9, 7, 4, 1, 1, 6, 14, 18, 9, 11, 5, 1, 1, 7, 20, 32, 27, 11, 16, 6, 1, 1, 8, 27, 52, 59, 27, 27, 22, 7, 1, 1, 9, 35, 79, 111, 86, 54, 49, 29, 8, 1, 1, 10, 44, 114, 190, 197, 140, 103, 78, 37, 9, 1, 1, 11, 54, 158, 304, 387
Offset: 1
Examples
Northwest corner: 0 1 1 1 1 1 1 1 2 3 4 5 1 1 2 5 9 14 1 2 4 9 18 32 1 3 7 9 27 59 The 4 UR paths for T(3,2) are RRRUU, RRURU, UURRR, URURR. These paths touch the line y=2x/3 only at the lattice points (0,0) and (3,2).