n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 17 |
4 | 73 |
5 | 319 |
6 | 1423 |
7 | 6499 |
8 | 30374 |
9 | 145302 |
10 | 711177 |
11 | 3559690 |
12 | 18212192 |
13 | 95193547 |
14 | 508083746 |
15 | 2767835600 |
16 | 15382476029 |
17 | 87177582535 |
18 | 503610832756 |
19 | 2964300557548 |
20 | 17771210411578 |
21 | 108471258414870 |
22 | 673836620069035 |
23 | 4258727230198033 |
24 | 27373904651169023 |
25 | 178885471934461869 |
[1,4,17,73,319,1423,6499,30374,145302,711177, 3559690,18212192,95193547,508083746,2767835600, 15382476029,87177582535,503610832756, 2964300557548,17771210411578,108471258414870, 673836620069035,4258727230198033, 27373904651169023,178885471934461869] |