n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 5 |
4 | 22 |
5 | 258 |
6 | 1628 |
7 | 18052 |
8 | 145976 |
9 | 1837272 |
10 | 18407664 |
11 | 265312848 |
12 | 3184567136 |
13 | 52020223648 |
14 | 728304073664 |
15 | 13317701313600 |
16 | 213083801827200 |
17 | 4314950946864000 |
18 | 77669134543011584 |
19 | 1725980887361498368 |
20 | 34519618313219995136 |
21 | 835374767116711506432 |
22 | 18378244896208168541184 |
[0,0,5,22,258,1628,18052,145976,1837272,18407664, 265312848,3184567136,52020223648,728304073664, 13317701313600,213083801827200,4314950946864000, 77669134543011584,1725980887361498368, 34519618313219995136,835374767116711506432, 18378244896208168541184] |