A316723 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j=1..k} (1+x^j)/(1-x^j).
1, 1, 0, 1, 2, 0, 1, 2, 2, 0, 1, 2, 4, 2, 0, 1, 2, 4, 6, 2, 0, 1, 2, 4, 8, 8, 2, 0, 1, 2, 4, 8, 12, 10, 2, 0, 1, 2, 4, 8, 14, 18, 12, 2, 0, 1, 2, 4, 8, 14, 22, 26, 14, 2, 0, 1, 2, 4, 8, 14, 24, 34, 34, 16, 2, 0, 1, 2, 4, 8, 14, 24, 38, 50, 44, 18, 2, 0, 1, 2, 4, 8, 14, 24, 40, 58, 70, 56, 20, 2, 0
Offset: 0
Examples
Square array begins: 1, 1, 1, 1, 1, 1, 1, ... 0, 2, 2, 2, 2, 2, 2, ... 0, 2, 4, 4, 4, 4, 4, ... 0, 2, 6, 8, 8, 8, 8, ... 0, 2, 8, 12, 14, 14, 14, ... 0, 2, 10, 18, 22, 24, 24, ... 0, 2, 12, 26, 34, 38, 40, ...
Links
- Seiichi Manyama, Antidiagonals n = 0..139, flattened