n | a(n) |
---|---|
1 | 3 |
2 | 14 |
3 | 78 |
4 | 416 |
5 | 2228 |
6 | 11912 |
7 | 63688 |
8 | 340480 |
9 | 1820208 |
10 | 9730784 |
11 | 52020448 |
12 | 278099456 |
13 | 1486709568 |
14 | 7947894912 |
15 | 42489154688 |
16 | 227145461760 |
17 | 1214311301888 |
18 | 6491663650304 |
19 | 34704195603968 |
20 | 185527355908096 |
21 | 991822435038208 |
[3,14,78,416,2228,11912,63688,340480,1820208, 9730784,52020448,278099456,1486709568,7947894912, 42489154688,227145461760,1214311301888, 6491663650304,34704195603968,185527355908096, 991822435038208] |