n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 12 |
6 | 38 |
7 | 150 |
8 | 648 |
9 | 3218 |
10 | 17476 |
11 | 105150 |
12 | 686012 |
13 | 4858602 |
14 | 36966912 |
15 | 301473146 |
16 | 2619548392 |
17 | 24181633098 |
18 | 236214717380 |
19 | 2435055354798 |
20 | 26413257186156 |
21 | 300761256373298 |
22 | 3586799346195376 |
23 | 44710179730250874 |
24 | 581430401788576664 |
25 | 7874808892125746226 |
[1,1,1,2,4,12,38,150,648,3218,17476,105150,686012, 4858602,36966912,301473146,2619548392,24181633098, 236214717380,2435055354798,26413257186156, 300761256373298,3586799346195376, 44710179730250874,581430401788576664, 7874808892125746226] |