n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 67 |
6 | 368 |
7 | 2630 |
8 | 24376 |
9 | 293770 |
10 | 4610624 |
11 | 94080653 |
12 | 2492747656 |
13 | 85827875506 |
14 | 3842929319936 |
15 | 223624506056156 |
16 | 16901839470598576 |
17 | 1659776507866213636 |
18 | 211853506422044996288 |
19 | 35137231473111223912310 |
20 | 7569998079873075147860464 |
[1,2,5,16,67,368,2630,24376,293770,4610624, 94080653,2492747656,85827875506,3842929319936, 223624506056156,16901839470598576, 1659776507866213636,211853506422044996288, 35137231473111223912310,7569998079873075147860464] |