n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 57 |
6 | 1082 |
7 | 42354 |
8 | 2278938 |
9 | 154294582 |
10 | 12767337844 |
11 | 1267231350044 |
12 | 148617033979348 |
13 | 20331541618406216 |
[1,2,4,11,57,1082,42354,2278938,154294582, 12767337844,1267231350044,148617033979348, 20331541618406216] |