n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 38 |
4 | 344 |
5 | 3832 |
6 | 51408 |
7 | 803952 |
8 | 14371456 |
9 | 289005440 |
10 | 6457624832 |
11 | 158719896832 |
12 | 4255775425536 |
13 | 123619815742464 |
14 | 3867071262472192 |
15 | 129610289219999744 |
16 | 4633674344869756928 |
17 | 176011269522607144960 |
18 | 7079115958438736363520 |
[1,1,6,38,344,3832,51408,803952,14371456, 289005440,6457624832,158719896832,4255775425536, 123619815742464,3867071262472192, 129610289219999744,4633674344869756928, 176011269522607144960,7079115958438736363520] |