n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 26 |
4 | 66 |
5 | 154 |
6 | 346 |
7 | 771 |
8 | 1726 |
9 | 3887 |
10 | 8768 |
11 | 19700 |
12 | 43890 |
13 | 96717 |
14 | 210665 |
15 | 453893 |
16 | 968903 |
17 | 2053260 |
18 | 4328489 |
19 | 9093971 |
20 | 19068611 |
21 | 39943689 |
22 | 83628399 |
23 | 175018523 |
24 | 366081209 |
25 | 765102907 |
26 | 1597315656 |
27 | 3330380593 |
28 | 6933810145 |
[1,3,9,26,66,154,346,771,1726,3887,8768,19700, 43890,96717,210665,453893,968903,2053260,4328489, 9093971,19068611,39943689,83628399,175018523, 366081209,765102907,1597315656,3330380593, 6933810145] |