n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 9 |
4 | 52 |
5 | 365 |
6 | 3006 |
7 | 28357 |
8 | 301064 |
9 | 3549177 |
10 | 45965530 |
11 | 648352001 |
12 | 9888877692 |
13 | 162112109029 |
14 | 2841669616982 |
15 | 53025262866045 |
16 | 1049180850990736 |
17 | 21937381717388657 |
18 | 483239096122434354 |
19 | 11184035897992673017 |
20 | 271287473871771163460 |
21 | 6881656485607798743261 |
[1,2,9,52,365,3006,28357,301064,3549177,45965530, 648352001,9888877692,162112109029,2841669616982, 53025262866045,1049180850990736,21937381717388657, 483239096122434354,11184035897992673017, 271287473871771163460,6881656485607798743261] |