n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 19 |
4 | 89 |
5 | 401 |
6 | 1877 |
7 | 8821 |
8 | 41969 |
9 | 200899 |
10 | 967605 |
11 | 4681491 |
12 | 22739705 |
13 | 110816343 |
14 | 541561333 |
15 | 2653061819 |
16 | 13024808161 |
17 | 64063300481 |
18 | 315624211781 |
19 | 1557318893473 |
20 | 7694243895289 |
21 | 38060959885345 |
22 | 188482408625373 |
23 | 934323819631893 |
24 | 4635781966972721 |
25 | 23020536772620401 |
[1,1,5,19,89,401,1877,8821,41969,200899,967605, 4681491,22739705,110816343,541561333,2653061819, 13024808161,64063300481,315624211781, 1557318893473,7694243895289,38060959885345, 188482408625373,934323819631893,4635781966972721, 23020536772620401] |