n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 59 |
5 | 328 |
6 | 1987 |
7 | 12819 |
8 | 86840 |
9 | 611993 |
10 | 4458355 |
11 | 33425634 |
12 | 257101218 |
13 | 2024379762 |
14 | 16292282944 |
15 | 133886553125 |
16 | 1122781620139 |
17 | 9605824882455 |
18 | 83838618087996 |
19 | 746620718694421 |
20 | 6786473727400695 |
21 | 62988617523112588 |
22 | 597257517555481856 |
[1,1,3,12,59,328,1987,12819,86840,611993,4458355, 33425634,257101218,2024379762,16292282944, 133886553125,1122781620139,9605824882455, 83838618087996,746620718694421,6786473727400695, 62988617523112588,597257517555481856] |