n | a(n) |
---|---|
1 | 2 |
2 | 8 |
3 | 52 |
4 | 376 |
5 | 2998 |
6 | 25256 |
7 | 222128 |
8 | 2013680 |
9 | 18691522 |
10 | 176743160 |
11 | 1696546848 |
12 | 16488151400 |
13 | 161919802562 |
14 | 1604274741608 |
15 | 16016845623764 |
16 | 160977882238968 |
17 | 1627406260427490 |
18 | 16537733701226936 |
[2,8,52,376,2998,25256,222128,2013680,18691522, 176743160,1696546848,16488151400,161919802562, 1604274741608,16016845623764,160977882238968, 1627406260427490,16537733701226936] |