n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 60 |
4 | 464 |
5 | 3780 |
6 | 32568 |
7 | 296492 |
8 | 2845088 |
9 | 28695060 |
10 | 303334920 |
11 | 3351877628 |
12 | 38622668400 |
13 | 463036981732 |
14 | 5764038605528 |
15 | 74365952622540 |
16 | 992720923710272 |
17 | 13690497077256628 |
18 | 194777994524434344 |
19 | 2855149354656290716 |
[0,1,8,60,464,3780,32568,296492,2845088,28695060, 303334920,3351877628,38622668400,463036981732, 5764038605528,74365952622540,992720923710272, 13690497077256628,194777994524434344, 2855149354656290716] |