n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 38 |
3 | 468 |
4 | 6545 |
5 | 98728 |
6 | 1566040 |
7 | 25747128 |
8 | 434824104 |
9 | 7498246100 |
10 | 131477423220 |
11 | 2337053822012 |
12 | 42016842044268 |
13 | 762702138530080 |
14 | 13959382918289880 |
15 | 257323577200329904 |
16 | 4773171937236245400 |
17 | 89028543731246186400 |
18 | 1668706597425638149302 |
[1,4,38,468,6545,98728,1566040,25747128,434824104, 7498246100,131477423220,2337053822012, 42016842044268,762702138530080,13959382918289880, 257323577200329904,4773171937236245400, 89028543731246186400,1668706597425638149302] |