OFFSET
1,3
COMMENTS
Row sums give A008683.
EXAMPLE
Triangle begins:
1
1 -2,
1 -2, 0,
1 -2, 0, 1,
1 -2, 0, 1, -1,
1 -2, 0, 1, -1, 2,
1 -2, 0, 1, -1, 2, -2,
1 -2, 0, 1, -1, 2, -2, 1,
1 -2, 0, 1, -1, 2, -2, 1, 0,
1 -2, 0, 1, -1, 2, -2, 1, 0, 1,
1 -2, 0, 1, -1, 2, -2, 1, 0, 1, -2,
CROSSREFS
KEYWORD
tabl,sign
AUTHOR
Gary W. Adamson, Jan 14 2007
EXTENSIONS
One term corrected by T. D. Noe, Feb 08 2007
Edited, corrected and extended by N. J. A. Sloane, Mar 01 2007
STATUS
approved