n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 57 |
4 | 301 |
5 | 1700 |
6 | 10045 |
7 | 61303 |
8 | 383335 |
9 | 2443113 |
10 | 15811317 |
11 | 103627692 |
12 | 686402602 |
13 | 4587643765 |
14 | 30900426417 |
15 | 209539509967 |
16 | 1429344492215 |
17 | 9801262309209 |
18 | 67523359213569 |
19 | 467136798336153 |
20 | 3243948604314619 |
21 | 22604271635042853 |
22 | 158001453530915361 |
[1,3,12,57,301,1700,10045,61303,383335,2443113, 15811317,103627692,686402602,4587643765, 30900426417,209539509967,1429344492215, 9801262309209,67523359213569,467136798336153, 3243948604314619,22604271635042853, 158001453530915361] |