n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 69 |
5 | 258 |
6 | 1014 |
7 | 4082 |
8 | 16800 |
9 | 70383 |
10 | 299011 |
11 | 1284372 |
12 | 5572651 |
13 | 24374059 |
14 | 107358625 |
15 | 475819313 |
16 | 2120059036 |
17 | 9490995387 |
18 | 42668497139 |
19 | 192542510134 |
20 | 871799541820 |
21 | 3959436307454 |
22 | 18032344193044 |
23 | 82332352883961 |
24 | 376785054885822 |
25 | 1727985033292291 |
26 | 7940321135142378 |
27 | 36553005597894890 |
[1,2,6,19,69,258,1014,4082,16800,70383,299011, 1284372,5572651,24374059,107358625,475819313, 2120059036,9490995387,42668497139,192542510134, 871799541820,3959436307454,18032344193044, 82332352883961,376785054885822,1727985033292291, 7940321135142378,36553005597894890] |