n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 268 |
4 | 5500 |
5 | 143046 |
6 | 4491340 |
7 | 164927288 |
8 | 6926613912 |
9 | 327225762250 |
10 | 17166979868764 |
11 | 989951268341124 |
12 | 62226648527948008 |
13 | 4234070369464440974 |
14 | 310027061374942635000 |
15 | 24305529829528548674800 |
16 | 2031272969339630171158576 |
17 | 180267634530033586511045778 |
[1,2,18,268,5500,143046,4491340,164927288, 6926613912,327225762250,17166979868764, 989951268341124,62226648527948008, 4234070369464440974,310027061374942635000, 24305529829528548674800,2031272969339630171158576, 180267634530033586511045778] |