n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 49 |
5 | 175 |
6 | 637 |
7 | 2353 |
8 | 8788 |
9 | 33098 |
10 | 125476 |
11 | 478192 |
12 | 1830270 |
13 | 7030570 |
14 | 27088870 |
15 | 104647630 |
16 | 405187825 |
17 | 1571990935 |
18 | 6109558585 |
19 | 23782190485 |
20 | 92705454895 |
21 | 361834392115 |
22 | 1413883873975 |
23 | 5530599237775 |
24 | 21654401079325 |
25 | 84859704298201 |
26 | 332818970772253 |
[1,4,14,49,175,637,2353,8788,33098,125476,478192, 1830270,7030570,27088870,104647630,405187825, 1571990935,6109558585,23782190485,92705454895, 361834392115,1413883873975,5530599237775, 21654401079325,84859704298201,332818970772253] |