OFFSET
0,2
COMMENTS
Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...).
EXAMPLE
First few rows of the triangle:
1;
3, 2;
1, 6, 3;
1, 2, 9, 4;
1, 2, 3, 12, 5;
1, 2, 3, 4, 15, 6;
1, 2, 3, 4, 5, 18, 7;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Oct 13 2007
STATUS
approved