n | a(n) |
---|---|
10 | 1 |
11 | 20 |
12 | 230 |
13 | 1940 |
14 | 13285 |
15 | 77944 |
16 | 405250 |
17 | 1910330 |
18 | 8300380 |
19 | 33655860 |
20 | 128574734 |
21 | 466317760 |
22 | 1615509765 |
23 | 5373215450 |
24 | 17230062315 |
25 | 53457917856 |
26 | 160963157005 |
27 | 471587847690 |
28 | 1347417640405 |
29 | 3761860656610 |
30 | 10280578499844 |
31 | 27543107112940 |
32 | 72440412567485 |
[1,20,230,1940,13285,77944,405250,1910330,8300380, 33655860,128574734,466317760,1615509765, 5373215450,17230062315,53457917856,160963157005, 471587847690,1347417640405,3761860656610, 10280578499844,27543107112940,72440412567485] |