n | a(n) |
---|---|
0 | 1 |
1 | 21 |
2 | 99 |
3 | 369 |
4 | 1607 |
5 | 7051 |
6 | 31743 |
7 | 144683 |
8 | 666527 |
9 | 3094947 |
10 | 14463569 |
11 | 67946603 |
12 | 320593259 |
13 | 1518250599 |
14 | 7212838277 |
15 | 34360479199 |
16 | 164079145839 |
17 | 785173661987 |
18 | 3764380920489 |
19 | 18077996769707 |
20 | 86948519336037 |
21 | 418760656546517 |
[1,21,99,369,1607,7051,31743,144683,666527, 3094947,14463569,67946603,320593259,1518250599, 7212838277,34360479199,164079145839,785173661987, 3764380920489,18077996769707,86948519336037, 418760656546517] |