n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 3 |
6 | 8 |
7 | 19 |
8 | 64 |
9 | 213 |
10 | 880 |
11 | 3717 |
12 | 18288 |
13 | 92935 |
14 | 531440 |
15 | 3147495 |
16 | 20525168 |
17 | 138638825 |
18 | 1015694832 |
19 | 7700244745 |
20 | 62623847536 |
21 | 526317901451 |
22 | 4705365925872 |
23 | 43407723925499 |
24 | 423149546210416 |
25 | 4250149857500861 |
26 | 44868038386273776 |
27 | 487341646372204813 |
[1,1,1,1,2,3,8,19,64,213,880,3717,18288,92935, 531440,3147495,20525168,138638825,1015694832, 7700244745,62623847536,526317901451,4705365925872, 43407723925499,423149546210416,4250149857500861, 44868038386273776,487341646372204813] |