n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 1 |
8 | 4 |
9 | 7 |
10 | 18 |
11 | 31 |
12 | 70 |
13 | 126 |
14 | 261 |
15 | 484 |
16 | 960 |
17 | 1800 |
18 | 3515 |
19 | 6643 |
20 | 12852 |
21 | 24458 |
22 | 47151 |
23 | 90157 |
24 | 173744 |
25 | 333498 |
26 | 643230 |
27 | 1238671 |
28 | 2392650 |
29 | 4620006 |
30 | 8939676 |
31 | 17302033 |
32 | 33538048 |
33 | 65042526 |
34 | 126289800 |
35 | 245361172 |
[0,0,0,0,0,1,1,4,7,18,31,70,126,261,484,960,1800, 3515,6643,12852,24458,47151,90157,173744,333498, 643230,1238671,2392650,4620006,8939676,17302033, 33538048,65042526,126289800,245361172] |