n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 0 |
8 | 1 |
9 | 2 |
10 | 1 |
11 | 4 |
12 | 9 |
13 | 12 |
14 | 27 |
15 | 50 |
16 | 99 |
17 | 188 |
18 | 386 |
19 | 740 |
20 | 1528 |
21 | 3012 |
22 | 6192 |
23 | 12376 |
24 | 25594 |
25 | 51628 |
26 | 107135 |
27 | 218100 |
28 | 453895 |
29 | 930812 |
30 | 1943281 |
31 | 4009512 |
32 | 8394915 |
33 | 17414512 |
[0,0,0,0,0,1,0,1,2,1,4,9,12,27,50,99,188,386,740, 1528,3012,6192,12376,25594,51628,107135,218100, 453895,930812,1943281,4009512,8394915,17414512] |