n | a(n) |
---|---|
8 | 1 |
9 | 17 |
10 | 181 |
11 | 1361 |
12 | 8107 |
13 | 40187 |
14 | 172207 |
15 | 653921 |
16 | 2243296 |
17 | 7053912 |
18 | 20568960 |
19 | 56141388 |
20 | 144540144 |
21 | 353269224 |
22 | 824102928 |
23 | 1843357923 |
24 | 3969216603 |
25 | 8255612079 |
26 | 16635486439 |
27 | 32560881353 |
28 | 62048339353 |
29 | 115351334813 |
[1,17,181,1361,8107,40187,172207,653921,2243296, 7053912,20568960,56141388,144540144,353269224, 824102928,1843357923,3969216603,8255612079, 16635486439,32560881353,62048339353,115351334813] |