OFFSET
1,4
COMMENTS
Row sums = A053088: (1, 0, 3, 2, 9, 12, 31, 54, 117,...)
EXAMPLE
First few rows of the triangle are:
1;
-1, 1;
2, 0, 1;
-2, 2, 1, 1;
3, 0, 3, 2, 1;
-3, 3, 3, 5, 3, 1;
4, 0, 6, 8, 8, 4, 1;
-4, 4, 6, 14, 16, 12, 5, 1;
5, 0, 10, 10, 30, 28, 17, 6, 1;
...
CROSSREFS
KEYWORD
tabl,sign
AUTHOR
Gary W. Adamson, Feb 21 2007
STATUS
approved