n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 46 |
3 | 175 |
4 | 551 |
5 | 1518 |
6 | 3785 |
7 | 8735 |
8 | 18955 |
9 | 39130 |
10 | 77533 |
11 | 148487 |
12 | 276408 |
13 | 502415 |
14 | 895103 |
15 | 1568062 |
16 | 2708322 |
17 | 4622488 |
18 | 7811510 |
19 | 13091798 |
20 | 21791338 |
21 | 36067176 |
22 | 59419294 |
23 | 97522270 |
24 | 159571139 |
25 | 260459265 |
26 | 424302452 |
27 | 690141333 |
[1,9,46,175,551,1518,3785,8735,18955,39130,77533, 148487,276408,502415,895103,1568062,2708322, 4622488,7811510,13091798,21791338,36067176, 59419294,97522270,159571139,260459265,424302452, 690141333] |