n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 13 |
7 | 37 |
8 | 183 |
9 | 817 |
10 | 5601 |
11 | 59649 |
12 | 681701 |
13 | 9890411 |
14 | 176577709 |
15 | 3939621645 |
16 | 118135623109 |
17 | 4491780681983 |
18 | 213414295100783 |
19 | 12753739646336971 |
20 | 960252990758480757 |
21 | 92263548659475375193 |
[1,1,1,1,3,13,37,183,817,5601,59649,681701, 9890411,176577709,3939621645,118135623109, 4491780681983,213414295100783,12753739646336971, 960252990758480757,92263548659475375193] |