n | a(n) |
---|---|
0 | 2 |
1 | 6 |
2 | 16 |
3 | 50 |
4 | 234 |
5 | 1582 |
6 | 13376 |
7 | 130986 |
8 | 1441810 |
9 | 17572214 |
10 | 234662352 |
11 | 3405357826 |
12 | 53334454586 |
13 | 896324308830 |
14 | 16083557845504 |
15 | 306827170866362 |
16 | 6199668952527906 |
17 | 132240988644216166 |
18 | 2968971263911289360 |
19 | 69974827707903049554 |
20 | 1727194482044146637962 |
21 | 44552237162692939114766 |
[2,6,16,50,234,1582,13376,130986,1441810,17572214, 234662352,3405357826,53334454586,896324308830, 16083557845504,306827170866362,6199668952527906, 132240988644216166,2968971263911289360, 69974827707903049554,1727194482044146637962, 44552237162692939114766] |