n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 10 |
5 | 17 |
6 | 38 |
7 | 106 |
8 | 253 |
9 | 716 |
10 | 1903 |
11 | 5053 |
12 | 13786 |
13 | 39293 |
14 | 107641 |
15 | 302807 |
16 | 860099 |
17 | 2450684 |
18 | 7038472 |
19 | 20316895 |
20 | 58849665 |
21 | 171217429 |
22 | 499926666 |
23 | 1464276207 |
24 | 4301706250 |
25 | 12671810107 |
26 | 37419912977 |
27 | 110759884262 |
28 | 328525197554 |
[1,1,3,10,17,38,106,253,716,1903,5053,13786,39293, 107641,302807,860099,2450684,7038472,20316895, 58849665,171217429,499926666,1464276207, 4301706250,12671810107,37419912977,110759884262, 328525197554] |