n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 19 |
4 | 130 |
5 | 1120 |
6 | 11960 |
7 | 151595 |
8 | 2230550 |
9 | 37361755 |
10 | 701873371 |
11 | 14610774346 |
12 | 333746628499 |
13 | 8298025724194 |
14 | 223049950124065 |
15 | 6444634486214748 |
16 | 199165237980655863 |
17 | 6555102341516877027 |
18 | 228905611339161301812 |
19 | 8452656930719845696590 |
20 | 329075775511339959533232 |
21 | 13471099892869946627980017 |
[1,1,4,19,130,1120,11960,151595,2230550,37361755, 701873371,14610774346,333746628499,8298025724194, 223049950124065,6444634486214748, 199165237980655863,6555102341516877027, 228905611339161301812,8452656930719845696590, 329075775511339959533232, 13471099892869946627980017] |