n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 50 |
4 | 525 |
5 | 6552 |
6 | 93786 |
7 | 1504932 |
8 | 26640900 |
9 | 514083570 |
10 | 10713538550 |
11 | 239342496120 |
12 | 5697111804566 |
13 | 143759365731100 |
14 | 3829115870472600 |
15 | 107260549881604200 |
16 | 3149703964487098665 |
17 | 96686987797052290440 |
18 | 3094969650442399156350 |
19 | 103079905957566679518300 |
[1,1,6,50,525,6552,93786,1504932,26640900, 514083570,10713538550,239342496120,5697111804566, 143759365731100,3829115870472600, 107260549881604200,3149703964487098665, 96686987797052290440,3094969650442399156350, 103079905957566679518300] |