n | a(n) |
---|---|
0 | 4 |
1 | 22 |
2 | 128 |
3 | 746 |
4 | 4348 |
5 | 25342 |
6 | 147704 |
7 | 860882 |
8 | 5017588 |
9 | 29244646 |
10 | 170450288 |
11 | 993457082 |
12 | 5790292204 |
13 | 33748296142 |
14 | 196699484648 |
15 | 1146448611746 |
16 | 6681992185828 |
17 | 38945504503222 |
18 | 226991034833504 |
19 | 1323000704497802 |
20 | 7711013192153308 |
21 | 44943078448422046 |
[4,22,128,746,4348,25342,147704,860882,5017588, 29244646,170450288,993457082,5790292204, 33748296142,196699484648,1146448611746, 6681992185828,38945504503222,226991034833504, 1323000704497802,7711013192153308, 44943078448422046] |