n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 60 |
4 | 579 |
5 | 6017 |
6 | 65732 |
7 | 744264 |
8 | 8656795 |
9 | 102819507 |
10 | 1241838271 |
11 | 15205587136 |
12 | 188320591092 |
13 | 2354971302700 |
14 | 29693879866840 |
15 | 377104836064720 |
16 | 4819271465838795 |
17 | 61930407776801015 |
18 | 799765007716515125 |
19 | 10373651783800459340 |
20 | 135089139660222638795 |
[1,1,7,60,579,6017,65732,744264,8656795,102819507, 1241838271,15205587136,188320591092,2354971302700, 29693879866840,377104836064720,4819271465838795, 61930407776801015,799765007716515125, 10373651783800459340,135089139660222638795] |