n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 12 |
6 | 70 |
7 | 465 |
8 | 3507 |
9 | 30016 |
10 | 286884 |
11 | 3026655 |
12 | 34944085 |
13 | 438263364 |
14 | 5933502822 |
15 | 86248951243 |
16 | 1339751921865 |
17 | 22148051088480 |
18 | 388246725873208 |
19 | 7193423109763089 |
20 | 140462355821628771 |
21 | 2883013994348484940 |
[1,0,0,1,3,12,70,465,3507,30016,286884,3026655, 34944085,438263364,5933502822,86248951243, 1339751921865,22148051088480,388246725873208, 7193423109763089,140462355821628771, 2883013994348484940] |