n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 24 |
4 | 176 |
5 | 1376 |
6 | 10944 |
7 | 87424 |
8 | 699136 |
9 | 5592576 |
10 | 44739584 |
11 | 357914624 |
12 | 2863312896 |
13 | 22906494976 |
14 | 183251943424 |
15 | 1466015514624 |
16 | 11728124051456 |
17 | 93824992280576 |
18 | 750599937982464 |
19 | 6004799503335424 |
20 | 48038396025634816 |
[1,1,4,24,176,1376,10944,87424,699136,5592576, 44739584,357914624,2863312896,22906494976, 183251943424,1466015514624,11728124051456, 93824992280576,750599937982464,6004799503335424, 48038396025634816] |