n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 5 |
7 | 45 |
8 | 385 |
9 | 3710 |
10 | 38934 |
11 | 444990 |
12 | 5506710 |
13 | 73422855 |
14 | 1049946755 |
15 | 16035550531 |
16 | 260577696015 |
17 | 4489954146860 |
18 | 81781307674780 |
19 | 1570201107355980 |
20 | 31698434854748604 |
21 | 671260973394676605 |
22 | 14879618243581997745 |
[0,0,0,0,1,5,45,385,3710,38934,444990,5506710, 73422855,1049946755,16035550531,260577696015, 4489954146860,81781307674780,1570201107355980, 31698434854748604,671260973394676605, 14879618243581997745] |