n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 7 |
4 | 31 |
5 | 159 |
6 | 958 |
7 | 6706 |
8 | 53654 |
9 | 482888 |
10 | 4828888 |
11 | 53117772 |
12 | 637413271 |
13 | 8286372532 |
14 | 116009215452 |
15 | 1740138231786 |
16 | 27842211708589 |
17 | 473317599046024 |
18 | 8519716782828440 |
19 | 161874618873740361 |
20 | 3237492377474807236 |
[1,2,7,31,159,958,6706,53654,482888,4828888, 53117772,637413271,8286372532,116009215452, 1740138231786,27842211708589,473317599046024, 8519716782828440,161874618873740361, 3237492377474807236] |