n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 48 |
4 | 411 |
5 | 3765 |
6 | 36308 |
7 | 363446 |
8 | 3742085 |
9 | 39405777 |
10 | 422669224 |
11 | 4603472960 |
12 | 50790334667 |
13 | 566603884871 |
14 | 6381702580969 |
15 | 72481863380510 |
16 | 829331355150992 |
17 | 9551576115706329 |
18 | 110654552651370400 |
19 | 1288710163262774157 |
20 | 15080440970246785366 |
21 | 177237948953055593475 |
[1,1,6,48,411,3765,36308,363446,3742085,39405777, 422669224,4603472960,50790334667,566603884871, 6381702580969,72481863380510,829331355150992, 9551576115706329,110654552651370400, 1288710163262774157,15080440970246785366, 177237948953055593475] |