n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 40 |
6 | 1844 |
7 | 41584 |
8 | 611340 |
9 | 6588116 |
10 | 55482100 |
11 | 380126920 |
12 | 2177910310 |
13 | 10644616240 |
14 | 45049914588 |
15 | 167011924492 |
16 | 547315800984 |
17 | 1597026077496 |
18 | 4173458163098 |
19 | 9813490226056 |
20 | 20841357619302 |
21 | 40096048882028 |
[0,0,0,0,40,1844,41584,611340,6588116,55482100, 380126920,2177910310,10644616240,45049914588, 167011924492,547315800984,1597026077496, 4173458163098,9813490226056,20841357619302, 40096048882028] |