n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 6 |
4 | 17 |
5 | 70 |
6 | 390 |
7 | 2776 |
8 | 24042 |
9 | 244864 |
10 | 2862185 |
11 | 37715474 |
12 | 552685976 |
13 | 8910951840 |
14 | 156709821779 |
15 | 2984589501562 |
16 | 61188398397436 |
17 | 1343410717573876 |
18 | 31445844702847347 |
19 | 781689483100388326 |
20 | 20564696601659697997 |
[1,2,3,6,17,70,390,2776,24042,244864,2862185, 37715474,552685976,8910951840,156709821779, 2984589501562,61188398397436,1343410717573876, 31445844702847347,781689483100388326, 20564696601659697997] |