n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 0 |
5 | 1 |
6 | 1 |
7 | 3 |
8 | 2 |
9 | 12 |
10 | 14 |
11 | 50 |
12 | 97 |
13 | 312 |
14 | 744 |
15 | 2291 |
16 | 6186 |
17 | 18714 |
18 | 53793 |
19 | 162565 |
20 | 482416 |
21 | 1467094 |
22 | 4436536 |
23 | 13594266 |
[0,0,1,0,1,1,3,2,12,14,50,97,312,744,2291,6186, 18714,53793,162565,482416,1467094,4436536, 13594266] |