n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 31 |
6 | 113 |
7 | 429 |
8 | 1679 |
9 | 6719 |
10 | 27367 |
11 | 113053 |
12 | 472471 |
13 | 1993785 |
14 | 8483023 |
15 | 36348595 |
16 | 156705421 |
17 | 679218965 |
18 | 2957961685 |
19 | 12936141935 |
20 | 56787742645 |
21 | 250137441355 |
22 | 1105189823717 |
23 | 4896749876081 |
24 | 21751355833739 |
[1,1,3,9,31,113,429,1679,6719,27367,113053,472471, 1993785,8483023,36348595,156705421,679218965, 2957961685,12936141935,56787742645,250137441355, 1105189823717,4896749876081,21751355833739] |