n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 74 |
6 | 384 |
7 | 1970 |
8 | 10282 |
9 | 65472 |
10 | 391386 |
11 | 2939090 |
12 | 20208896 |
13 | 147099900 |
14 | 1225118562 |
15 | 9901118700 |
16 | 97592995386 |
[1,2,6,16,74,384,1970,10282,65472,391386,2939090, 20208896,147099900,1225118562,9901118700, 97592995386] |