n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 13 |
3 | 81 |
4 | 504 |
5 | 3136 |
6 | 19513 |
7 | 121415 |
8 | 755476 |
9 | 4700770 |
10 | 29249425 |
11 | 181997601 |
12 | 1132436852 |
13 | 7046319384 |
14 | 43844049029 |
15 | 272809183135 |
16 | 1697490356184 |
17 | 10562230626642 |
18 | 65720971788709 |
19 | 408933139743937 |
20 | 2544489349890656 |
[0,2,13,81,504,3136,19513,121415,755476,4700770, 29249425,181997601,1132436852,7046319384, 43844049029,272809183135,1697490356184, 10562230626642,65720971788709,408933139743937, 2544489349890656] |