n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 9 |
4 | 22 |
5 | 46 |
6 | 109 |
7 | 237 |
8 | 571 |
9 | 1362 |
10 | 3459 |
11 | 8881 |
12 | 23698 |
13 | 63846 |
14 | 175489 |
15 | 485941 |
16 | 1359240 |
17 | 3821170 |
18 | 10803787 |
19 | 30654681 |
20 | 87295726 |
21 | 249262766 |
22 | 713583861 |
23 | 2047210813 |
24 | 5885081941 |
25 | 16947632202 |
26 | 48885431563 |
27 | 141220349049 |
[1,4,9,22,46,109,237,571,1362,3459,8881,23698, 63846,175489,485941,1359240,3821170,10803787, 30654681,87295726,249262766,713583861,2047210813, 5885081941,16947632202,48885431563,141220349049] |