n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 49 |
5 | 301 |
6 | 2281 |
7 | 21211 |
8 | 220417 |
9 | 2528569 |
10 | 32014801 |
11 | 442974511 |
12 | 6638604721 |
13 | 107089487077 |
14 | 1849731389689 |
15 | 34051409587651 |
16 | 665366551059841 |
17 | 13751213558077681 |
18 | 299644435399909537 |
19 | 6864906328749052759 |
20 | 164941239260973870001 |
21 | 4146673091958686331421 |
[1,1,1,7,49,301,2281,21211,220417,2528569, 32014801,442974511,6638604721,107089487077, 1849731389689,34051409587651,665366551059841, 13751213558077681,299644435399909537, 6864906328749052759,164941239260973870001, 4146673091958686331421] |