n | a(n) |
---|---|
2 | 1 |
3 | 10 |
4 | 69 |
5 | 340 |
6 | 1696 |
7 | 8774 |
8 | 44500 |
9 | 203884 |
10 | 998953 |
11 | 5026154 |
12 | 24474925 |
13 | 110862660 |
14 | 540493911 |
15 | 2706193730 |
16 | 13062307900 |
17 | 59214077236 |
18 | 288140818097 |
19 | 1439810493778 |
20 | 6934754735653 |
21 | 31544380215556 |
22 | 153401000364266 |
23 | 765589966351344 |
24 | 3686304297844080 |
25 | 16830906540844256 |
26 | 81840064308561274 |
[1,10,69,340,1696,8774,44500,203884,998953, 5026154,24474925,110862660,540493911,2706193730, 13062307900,59214077236,288140818097, 1439810493778,6934754735653,31544380215556, 153401000364266,765589966351344,3686304297844080, 16830906540844256,81840064308561274] |