n | a(n) |
---|---|
0 | 8 |
1 | 1 |
2 | 9 |
3 | 28 |
4 | 105 |
5 | 286 |
6 | 918 |
7 | 2871 |
8 | 8977 |
9 | 27892 |
10 | 87084 |
11 | 271635 |
12 | 847182 |
13 | 2641991 |
14 | 8240325 |
15 | 25700488 |
16 | 80156033 |
17 | 249994997 |
18 | 779700654 |
19 | 2431777739 |
20 | 7584375260 |
[8,1,9,28,105,286,918,2871,8977,27892,87084, 271635,847182,2641991,8240325,25700488,80156033, 249994997,779700654,2431777739,7584375260] |