n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 26 |
4 | 260 |
5 | 3610 |
6 | 64472 |
7 | 1409006 |
8 | 36432076 |
9 | 1087911890 |
10 | 36844580000 |
11 | 1395429571222 |
12 | 58439837713556 |
13 | 2681526361893626 |
14 | 133783187672365480 |
15 | 7210345924097089790 |
16 | 417482356526745344732 |
17 | 25844171201928905477026 |
18 | 1703359919973405018460976 |
[1,4,26,260,3610,64472,1409006,36432076, 1087911890,36844580000,1395429571222, 58439837713556,2681526361893626, 133783187672365480,7210345924097089790, 417482356526745344732,25844171201928905477026, 1703359919973405018460976] |