n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 7 |
6 | 25 |
7 | 117 |
8 | 567 |
9 | 2931 |
10 | 20165 |
11 | 140169 |
12 | 1008691 |
13 | 8756711 |
14 | 80546609 |
15 | 736667037 |
16 | 7767188015 |
17 | 87947663355 |
18 | 983717687645 |
19 | 12138623741969 |
20 | 162832820098219 |
21 | 2156307692882095 |
22 | 30489019112863689 |
23 | 470349294170629989 |
24 | 7212155129160617511 |
25 | 114968617914648215939 |
[1,1,1,1,3,7,25,117,567,2931,20165,140169,1008691, 8756711,80546609,736667037,7767188015,87947663355, 983717687645,12138623741969,162832820098219, 2156307692882095,30489019112863689, 470349294170629989,7212155129160617511, 114968617914648215939] |