n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 70 |
6 | 331 |
7 | 1863 |
8 | 11637 |
9 | 81110 |
10 | 635550 |
11 | 5495339 |
12 | 51590494 |
13 | 524043395 |
14 | 5743546943 |
15 | 67478821537 |
16 | 844983073638 |
17 | 11240221721390 |
18 | 158365579448315 |
19 | 2355375055596386 |
20 | 36870671943986643 |
21 | 606008531691619131 |
22 | 10435226671431973345 |
23 | 187860338952519968538 |
[1,1,2,6,19,70,331,1863,11637,81110,635550, 5495339,51590494,524043395,5743546943,67478821537, 844983073638,11240221721390,158365579448315, 2355375055596386,36870671943986643, 606008531691619131,10435226671431973345, 187860338952519968538] |