n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 6 |
6 | 17 |
7 | 37 |
8 | 102 |
9 | 239 |
10 | 658 |
11 | 1607 |
12 | 4425 |
13 | 11185 |
14 | 30990 |
15 | 80070 |
16 | 222731 |
17 | 586218 |
18 | 1638333 |
19 | 4370721 |
20 | 12262003 |
21 | 33077327 |
22 | 93128828 |
23 | 253454781 |
24 | 715784848 |
25 | 1962537755 |
26 | 5557799401 |
27 | 15332668869 |
28 | 43527249088 |
29 | 120716987723 |
[0,1,1,3,6,17,37,102,239,658,1607,4425,11185, 30990,80070,222731,586218,1638333,4370721, 12262003,33077327,93128828,253454781,715784848, 1962537755,5557799401,15332668869,43527249088, 120716987723] |