n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 9 |
5 | 63 |
6 | 412 |
7 | 2673 |
8 | 17571 |
9 | 117365 |
10 | 798819 |
11 | 5530122 |
12 | 38908380 |
13 | 277750749 |
14 | 2009160864 |
15 | 14707923021 |
16 | 108835512411 |
17 | 813241695330 |
18 | 6130521151377 |
19 | 46584949832013 |
20 | 356571373433217 |
21 | 2747371943624943 |
22 | 21296479544449677 |
23 | 165994877608025730 |
24 | 1300408539157086640 |
[0,0,1,9,63,412,2673,17571,117365,798819,5530122, 38908380,277750749,2009160864,14707923021, 108835512411,813241695330,6130521151377, 46584949832013,356571373433217,2747371943624943, 21296479544449677,165994877608025730, 1300408539157086640] |