n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 25 |
3 | 101 |
4 | 321 |
5 | 1075 |
6 | 3426 |
7 | 9958 |
8 | 30253 |
9 | 92735 |
10 | 253731 |
11 | 739303 |
12 | 2056915 |
13 | 5899304 |
14 | 17108660 |
15 | 46137324 |
16 | 130016549 |
17 | 370248450 |
18 | 993480845 |
19 | 2766546762 |
20 | 7510827752 |
21 | 20798505510 |
22 | 58123818148 |
23 | 155141346542 |
24 | 426530329383 |
[1,7,25,101,321,1075,3426,9958,30253,92735,253731, 739303,2056915,5899304,17108660,46137324, 130016549,370248450,993480845,2766546762, 7510827752,20798505510,58123818148,155141346542, 426530329383] |