OFFSET
0,2
COMMENTS
Row sums = A055588: (1, 2, 4, 9, 22, 56, 145,...).
FORMULA
EXAMPLE
First few rows of the triangle =
1;
2, 0;
3, 1, 0;
4, 4, 1, 0;
5, 10, 6, 1, 0;
6, 20, 21, 8, 1, 0;
7, 35, 56, 36, 10, 1, 0;
8, 56, 126, 120, 55, 12, 1, 0;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Sep 27 2008
STATUS
approved