n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 37 |
4 | 179 |
5 | 996 |
6 | 4740 |
7 | 21259 |
8 | 96524 |
9 | 443793 |
10 | 2054180 |
11 | 9533062 |
12 | 44194763 |
13 | 204545507 |
14 | 946059367 |
15 | 4375861741 |
16 | 20244334715 |
17 | 93671407936 |
18 | 433436316256 |
19 | 2005547859261 |
20 | 9279593479796 |
21 | 42935853340895 |
22 | 198660544800120 |
[1,9,37,179,996,4740,21259,96524,443793,2054180, 9533062,44194763,204545507,946059367,4375861741, 20244334715,93671407936,433436316256, 2005547859261,9279593479796,42935853340895, 198660544800120] |