n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 45 |
4 | 170 |
5 | 644 |
6 | 2451 |
7 | 9365 |
8 | 35908 |
9 | 138104 |
10 | 532589 |
11 | 2058782 |
12 | 7975216 |
13 | 30951921 |
14 | 120326060 |
15 | 468473348 |
16 | 1826415556 |
17 | 7129330988 |
18 | 27860219331 |
19 | 108984557708 |
20 | 426730087879 |
21 | 1672310507262 |
22 | 6558840830680 |
23 | 25742937514814 |
24 | 101108341344396 |
25 | 397368218111003 |
[1,3,12,45,170,644,2451,9365,35908,138104,532589, 2058782,7975216,30951921,120326060,468473348, 1826415556,7129330988,27860219331,108984557708, 426730087879,1672310507262,6558840830680, 25742937514814,101108341344396,397368218111003] |