n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 17 |
4 | 120 |
5 | 1169 |
6 | 13980 |
7 | 195649 |
8 | 3130288 |
9 | 56345057 |
10 | 1126900980 |
11 | 24791821361 |
12 | 595003712424 |
13 | 15470096522737 |
14 | 433162702636300 |
15 | 12994881079088609 |
16 | 415836194530835040 |
17 | 14138430614048390849 |
18 | 508983502105742069988 |
19 | 19341373080018198658897 |
[1,1,4,17,120,1169,13980,195649,3130288,56345057, 1126900980,24791821361,595003712424, 15470096522737,433162702636300,12994881079088609, 415836194530835040,14138430614048390849, 508983502105742069988,19341373080018198658897] |