n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 3 |
8 | 7 |
9 | 15 |
10 | 27 |
11 | 51 |
12 | 141 |
13 | 615 |
14 | 2523 |
15 | 10593 |
16 | 40853 |
17 | 196793 |
18 | 1114237 |
19 | 8094209 |
20 | 59485011 |
21 | 492771709 |
22 | 4132732207 |
23 | 42832582765 |
24 | 478558556527 |
[1,1,1,1,1,1,3,7,15,27,51,141,615,2523,10593, 40853,196793,1114237,8094209,59485011,492771709, 4132732207,42832582765,478558556527] |