n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 46 |
3 | 175 |
4 | 551 |
5 | 1520 |
6 | 3811 |
7 | 8921 |
8 | 19922 |
9 | 43211 |
10 | 92363 |
11 | 196608 |
12 | 419295 |
13 | 897565 |
14 | 1926458 |
15 | 4135255 |
16 | 8854359 |
17 | 18875392 |
18 | 40024059 |
19 | 84417521 |
20 | 177221602 |
21 | 370688979 |
22 | 773342163 |
23 | 1610612736 |
24 | 3350668423 |
25 | 6964989333 |
26 | 14466833194 |
27 | 30021724351 |
28 | 62233946303 |
[1,9,46,175,551,1520,3811,8921,19922,43211,92363, 196608,419295,897565,1926458,4135255,8854359, 18875392,40024059,84417521,177221602,370688979, 773342163,1610612736,3350668423,6964989333, 14466833194,30021724351,62233946303] |