n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 6 |
8 | 27 |
9 | 83 |
10 | 209 |
11 | 461 |
12 | 923 |
13 | 10284 |
14 | 80991 |
15 | 414961 |
16 | 1671853 |
17 | 5699149 |
18 | 17116009 |
19 | 278723178 |
20 | 3135810159 |
21 | 22493048843 |
22 | 124606826189 |
23 | 574688719793 |
24 | 2301250545971 |
25 | 49308397822776 |
26 | 721175428306971 |
27 | 6650954153090521 |
28 | 46893517738791361 |
[1,1,1,1,1,1,1,6,27,83,209,461,923,10284,80991, 414961,1671853,5699149,17116009,278723178, 3135810159,22493048843,124606826189,574688719793, 2301250545971,49308397822776,721175428306971, 6650954153090521,46893517738791361] |