n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 28 |
3 | 120 |
4 | 504 |
5 | 2128 |
6 | 9016 |
7 | 38208 |
8 | 161864 |
9 | 685648 |
10 | 2904408 |
11 | 12303264 |
12 | 52117544 |
13 | 220773552 |
14 | 935211704 |
15 | 3961620096 |
16 | 16781691912 |
17 | 71088388112 |
18 | 301135245080 |
19 | 1275629368416 |
20 | 5403652717288 |
21 | 22890240236144 |
22 | 96964613663352 |
23 | 410748694893888 |
24 | 1739959393240264 |
[1,6,28,120,504,2128,9016,38208,161864,685648, 2904408,12303264,52117544,220773552,935211704, 3961620096,16781691912,71088388112,301135245080, 1275629368416,5403652717288,22890240236144, 96964613663352,410748694893888,1739959393240264] |