n | a(n) |
---|---|
0 | 1 |
1 | 54 |
2 | 1431 |
3 | 24804 |
4 | 316251 |
5 | 3162510 |
6 | 25827165 |
7 | 177100560 |
8 | 1040465790 |
9 | 5317936260 |
10 | 23930713170 |
11 | 95722852680 |
12 | 343006888770 |
13 | 1108176102180 |
14 | 3245372870670 |
15 | 8654327655120 |
16 | 21094923659355 |
17 | 47153358767970 |
18 | 96926348578605 |
19 | 183649923622620 |
20 | 321387366339585 |
[1,54,1431,24804,316251,3162510,25827165, 177100560,1040465790,5317936260,23930713170, 95722852680,343006888770,1108176102180, 3245372870670,8654327655120,21094923659355, 47153358767970,96926348578605,183649923622620, 321387366339585] |