n | a(n) |
---|---|
2 | 1 |
3 | 4 |
4 | 11 |
5 | 31 |
6 | 87 |
7 | 246 |
8 | 699 |
9 | 1996 |
10 | 5723 |
11 | 16468 |
12 | 47533 |
13 | 137567 |
14 | 399073 |
15 | 1160082 |
16 | 3378483 |
17 | 9855207 |
18 | 28790403 |
19 | 84218052 |
20 | 246651729 |
21 | 723165765 |
22 | 2122391109 |
23 | 6234634266 |
24 | 18330019029 |
25 | 53932825926 |
26 | 158802303429 |
27 | 467898288676 |
28 | 1379485436579 |
29 | 4069450219561 |
[1,4,11,31,87,246,699,1996,5723,16468,47533, 137567,399073,1160082,3378483,9855207,28790403, 84218052,246651729,723165765,2122391109, 6234634266,18330019029,53932825926,158802303429, 467898288676,1379485436579,4069450219561] |