n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 129 |
3 | 646 |
4 | 2685 |
5 | 10002 |
6 | 34777 |
7 | 115566 |
8 | 372453 |
9 | 1175290 |
10 | 3654369 |
11 | 11245110 |
12 | 34349005 |
13 | 104373282 |
14 | 315969705 |
15 | 954002878 |
16 | 2874983541 |
17 | 8652474378 |
18 | 26015617585 |
19 | 78169534470 |
20 | 234766551261 |
21 | 704840716978 |
22 | 2115654610809 |
23 | 6349329417486 |
24 | 19052920751365 |
25 | 57169029907482 |
[1,18,129,646,2685,10002,34777,115566,372453, 1175290,3654369,11245110,34349005,104373282, 315969705,954002878,2874983541,8652474378, 26015617585,78169534470,234766551261,704840716978, 2115654610809,6349329417486,19052920751365, 57169029907482] |