n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 30 |
4 | 219 |
5 | 2029 |
6 | 21951 |
7 | 266508 |
8 | 3555679 |
9 | 51459059 |
10 | 800597860 |
11 | 13299687789 |
12 | 234649789192 |
13 | 4377700776217 |
14 | 86042611873972 |
15 | 1775987427897604 |
16 | 38389651084747947 |
17 | 866887176020724213 |
18 | 20404374490338189930 |
[1,2,6,30,219,2029,21951,266508,3555679,51459059, 800597860,13299687789,234649789192,4377700776217, 86042611873972,1775987427897604,38389651084747947, 866887176020724213,20404374490338189930] |