n | a(n) |
---|---|
1 | 1 |
2 | 8 |
3 | 37 |
4 | 138 |
5 | 680 |
6 | 2413 |
7 | 10017 |
8 | 43956 |
9 | 159668 |
10 | 681760 |
11 | 2806434 |
12 | 10675575 |
13 | 45462460 |
14 | 181764269 |
15 | 715963401 |
16 | 3000804172 |
17 | 11895218236 |
18 | 47847647772 |
19 | 197325296591 |
20 | 783759057127 |
21 | 3182984036915 |
22 | 12972975259195 |
23 | 51820141213238 |
[1,8,37,138,680,2413,10017,43956,159668,681760, 2806434,10675575,45462460,181764269,715963401, 3000804172,11895218236,47847647772,197325296591, 783759057127,3182984036915,12972975259195, 51820141213238] |