n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 30 |
5 | 107 |
6 | 399 |
7 | 1537 |
8 | 6069 |
9 | 24434 |
10 | 99924 |
11 | 413943 |
12 | 1733394 |
13 | 7325471 |
14 | 31203159 |
15 | 133825441 |
16 | 577418430 |
17 | 2504681465 |
18 | 10916208453 |
19 | 47778816718 |
20 | 209923718880 |
21 | 925537620996 |
22 | 4093530000888 |
23 | 18157477014599 |
24 | 80753894026905 |
[1,1,3,9,30,107,399,1537,6069,24434,99924,413943, 1733394,7325471,31203159,133825441,577418430, 2504681465,10916208453,47778816718,209923718880, 925537620996,4093530000888,18157477014599, 80753894026905] |