n | a(n) |
---|---|
1 | 1 |
2 | 18 |
3 | 141 |
4 | 993 |
5 | 7330 |
6 | 54106 |
7 | 398654 |
8 | 2937795 |
9 | 21650600 |
10 | 159556133 |
11 | 1175862733 |
12 | 8665626722 |
13 | 63862119016 |
14 | 470637646700 |
15 | 3468406597875 |
16 | 25560735353400 |
17 | 188372145331363 |
18 | 1388225520347031 |
19 | 10230653220855076 |
20 | 75395721942360742 |
[1,18,141,993,7330,54106,398654,2937795,21650600, 159556133,1175862733,8665626722,63862119016, 470637646700,3468406597875,25560735353400, 188372145331363,1388225520347031, 10230653220855076,75395721942360742] |