n | a(n) |
---|---|
2 | 1 |
3 | 21 |
4 | 408 |
5 | 6410 |
6 | 113748 |
7 | 2002405 |
8 | 35669433 |
9 | 633099244 |
10 | 11240647480 |
11 | 199480271184 |
12 | 3540336868535 |
13 | 62831861216325 |
14 | 1115122033297714 |
15 | 19790829247392636 |
16 | 351241699540793996 |
17 | 6233729269914805533 |
18 | 110634310753645173365 |
19 | 1963503651093439655818 |
20 | 34847658208568166865562 |
21 | 618465506517313482341986 |
[1,21,408,6410,113748,2002405,35669433,633099244, 11240647480,199480271184,3540336868535, 62831861216325,1115122033297714,19790829247392636, 351241699540793996,6233729269914805533, 110634310753645173365,1963503651093439655818, 34847658208568166865562,618465506517313482341986] |