n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 4 |
3 | 16 |
4 | 76 |
5 | 304 |
6 | 1264 |
7 | 5056 |
8 | 20404 |
9 | 81616 |
10 | 327184 |
11 | 1308736 |
12 | 5237776 |
13 | 20951104 |
14 | 83815744 |
15 | 335262976 |
16 | 1341097036 |
17 | 5364388144 |
18 | 21457733104 |
19 | 85830932416 |
20 | 343324451056 |
21 | 1373297804224 |
22 | 5493194102464 |
23 | 21972776409856 |
24 | 87891117178864 |
[0,0,4,16,76,304,1264,5056,20404,81616,327184, 1308736,5237776,20951104,83815744,335262976, 1341097036,5364388144,21457733104,85830932416, 343324451056,1373297804224,5493194102464, 21972776409856,87891117178864] |