OFFSET
0,2
EXAMPLE
The 4 UR paths counted by a(1)=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).
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Feb 01 2007
STATUS
approved