n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 4 |
4 | 170 |
5 | 9860 |
6 | 23450 |
7 | 56980 |
8 | 56980 |
9 | 6723767050 |
10 | 48276858630 |
11 | 77460393371130 |
12 | 97581361797920 |
13 | 97581361797920 |
14 | 1269928100726715430 |
[2,2,4,170,9860,23450,56980,56980,6723767050, 48276858630,77460393371130,97581361797920, 97581361797920,1269928100726715430] |