n | a(n) |
---|---|
6 | 1 |
7 | 15 |
8 | 122 |
9 | 715 |
10 | 3388 |
11 | 13817 |
12 | 50439 |
13 | 169324 |
14 | 533115 |
15 | 1597981 |
16 | 4613544 |
17 | 12948083 |
18 | 35582783 |
19 | 96296410 |
20 | 257763847 |
21 | 684721291 |
22 | 1809437921 |
23 | 4765066652 |
24 | 12520359325 |
25 | 32850638623 |
26 | 86116228859 |
27 | 225627072434 |
[1,15,122,715,3388,13817,50439,169324,533115, 1597981,4613544,12948083,35582783,96296410, 257763847,684721291,1809437921,4765066652, 12520359325,32850638623,86116228859,225627072434] |