n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 23 |
6 | 67 |
7 | 198 |
8 | 590 |
9 | 1769 |
10 | 5328 |
11 | 16103 |
12 | 48801 |
13 | 148216 |
14 | 450952 |
15 | 1374044 |
16 | 4191814 |
17 | 12801243 |
18 | 39127766 |
19 | 119687036 |
20 | 366348367 |
21 | 1121992447 |
22 | 3437981365 |
23 | 10539237135 |
24 | 32321011234 |
25 | 99154404456 |
26 | 304280556111 |
27 | 934022848612 |
[1,1,3,8,23,67,198,590,1769,5328,16103,48801, 148216,450952,1374044,4191814,12801243,39127766, 119687036,366348367,1121992447,3437981365, 10539237135,32321011234,99154404456,304280556111, 934022848612] |