OFFSET
0,8
FORMULA
For k > 0, g.f. of column k: Sum_{i>=0} x^(k*i) * Product_{j=1..k*i-1} (1+x^j).
EXAMPLE
Triangle begins:
1;
0, 1;
0, 1, 1;
0, 2, 1, 1;
0, 2, 1, 1, 1;
0, 3, 1, 1, 1, 1;
0, 4, 2, 2, 1, 1, 1;
0, 5, 3, 1, 2, 1, 1, 1;
0, 6, 3, 1, 2, 2, 1, 1, 1;
0, 8, 4, 3, 2, 2, 2, 1, 1, 1;
0, 10, 5, 3, 2, 3, 2, 2, 1, 1, 1;
0, 12, 6, 4, 2, 3, 3, 2, 2, 1, 1, 1;
0, 15, 7, 6, 3, 3, 4, 3, 2, 2, 1, 1, 1;
0, 18, 9, 6, 4, 3, 4, 4, 3, 2, 2, 1, 1, 1;
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, May 20 2024
STATUS
approved