OFFSET
1,2
EXAMPLE
Northwest corner:
1....3....5....7....9....11....13
0....2....4....6....8....10....12
0....2....4....6....8....10....12
(row n)=(row n-1) for n>=3.
MATHEMATICA
(See A185780.)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Feb 03 2011
STATUS
approved