n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 15 |
5 | 87 |
6 | 597 |
7 | 4701 |
8 | 41787 |
9 | 413691 |
10 | 4512993 |
11 | 53779833 |
12 | 695000919 |
13 | 9680369943 |
14 | 144560191149 |
15 | 2303928046437 |
16 | 39031251610227 |
17 | 700394126116851 |
18 | 13270625547477177 |
19 | 264748979672169681 |
20 | 5547121478845459983 |
21 | 121784530649198053263 |
22 | 2795749225338111831429 |
23 | 66981491857058929294653 |
[1,0,1,3,15,87,597,4701,41787,413691,4512993, 53779833,695000919,9680369943,144560191149, 2303928046437,39031251610227,700394126116851, 13270625547477177,264748979672169681, 5547121478845459983,121784530649198053263, 2795749225338111831429,66981491857058929294653] |