n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 8 |
6 | 18 |
7 | 57 |
8 | 120 |
9 | 186 |
10 | 805 |
11 | 854 |
12 | 1018 |
13 | 2592 |
14 | 2748 |
15 | 3015 |
16 | 4294 |
17 | 9663 |
18 | 14926 |
19 | 34561 |
20 | 64386 |
21 | 71298 |
22 | 71950 |
[0,1,2,7,8,18,57,120,186,805,854,1018,2592,2748, 3015,4294,9663,14926,34561,64386,71298,71950] |