n | a(n) |
---|---|
0 | 2 |
1 | 8 |
2 | 28 |
3 | 98 |
4 | 344 |
5 | 1208 |
6 | 4240 |
7 | 14884 |
8 | 52248 |
9 | 183408 |
10 | 643824 |
11 | 2260040 |
12 | 7933504 |
13 | 27849280 |
14 | 97760384 |
15 | 343171984 |
16 | 1204649632 |
17 | 4228727296 |
18 | 14844261824 |
19 | 52108375328 |
20 | 182918006400 |
21 | 642104016000 |
22 | 2254002082560 |
23 | 7912309005376 |
24 | 27774878417792 |
25 | 97499209219328 |
[2,8,28,98,344,1208,4240,14884,52248,183408, 643824,2260040,7933504,27849280,97760384, 343171984,1204649632,4228727296,14844261824, 52108375328,182918006400,642104016000, 2254002082560,7912309005376,27774878417792, 97499209219328] |