OFFSET
1,1
EXAMPLE
Second boustrophedon path:
.................................1\
...............................____\
............................../1.0.1.
............................./________
.............................1.0.0.1.0\
............................___________\
........................../1.0.1.0.1.0.0
........................./________________
.........................1.0.0.1.1.0.1.1.1\
........................___________________\
.......................1.0.1.0.0.0.0.0.1.1.0
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paolo P. Lava and Giorgio Balzarotti, Jul 02 2008
STATUS
approved