n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 30 |
5 | 108 |
6 | 406 |
7 | 1577 |
8 | 6280 |
9 | 25499 |
10 | 105169 |
11 | 439388 |
12 | 1855636 |
13 | 7908909 |
14 | 33975250 |
15 | 146954693 |
16 | 639460707 |
17 | 2797384235 |
18 | 12295494109 |
19 | 54272825103 |
20 | 240480529815 |
21 | 1069257987503 |
22 | 4769306203838 |
23 | 21334400243252 |
24 | 95687482105807 |
25 | 430217846136134 |
26 | 1938651904470374 |
27 | 8754225470415889 |
[1,1,3,9,30,108,406,1577,6280,25499,105169,439388, 1855636,7908909,33975250,146954693,639460707, 2797384235,12295494109,54272825103,240480529815, 1069257987503,4769306203838,21334400243252, 95687482105807,430217846136134,1938651904470374, 8754225470415889] |