n | a(n) |
---|---|
3 | 1 |
4 | 2 |
5 | 2 |
6 | 7 |
7 | 14 |
8 | 53 |
9 | 171 |
10 | 691 |
11 | 2738 |
12 | 11720 |
13 | 50486 |
14 | 224012 |
15 | 1005468 |
16 | 4581815 |
17 | 21093190 |
18 | 98093226 |
19 | 459986674 |
20 | 2173599817 |
21 | 10340539744 |
22 | 49496519950 |
23 | 238240366274 |
24 | 1152543685463 |
25 | 5601603835982 |
26 | 27341242042238 |
27 | 133977037982121 |
28 | 658902522544060 |
29 | 3251446102879398 |
[1,2,2,7,14,53,171,691,2738,11720,50486,224012, 1005468,4581815,21093190,98093226,459986674, 2173599817,10340539744,49496519950,238240366274, 1152543685463,5601603835982,27341242042238, 133977037982121,658902522544060,3251446102879398] |