n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 18 |
5 | 91 |
6 | 604 |
7 | 5123 |
8 | 53808 |
9 | 679389 |
10 | 10107934 |
11 | 174544505 |
12 | 3451802006 |
13 | 77302457077 |
14 | 1942469215378 |
15 | 54339334896457 |
16 | 1680597905918398 |
17 | 57116435365152501 |
18 | 2121725699286935222 |
19 | 85740960693607190593 |
[1,2,5,18,91,604,5123,53808,679389,10107934, 174544505,3451802006,77302457077,1942469215378, 54339334896457,1680597905918398,57116435365152501, 2121725699286935222,85740960693607190593] |