n | a(n) |
---|---|
1 | 1 |
2 | 40 |
3 | 244 |
4 | 1496 |
5 | 8800 |
6 | 50084 |
7 | 277996 |
8 | 1513104 |
9 | 8106632 |
10 | 42869740 |
11 | 224232436 |
12 | 1161920760 |
13 | 5972173872 |
14 | 30479422388 |
15 | 154582269500 |
16 | 779632820512 |
17 | 3912450838808 |
18 | 19545592617532 |
19 | 97246103407556 |
20 | 482032538140680 |
[1,40,244,1496,8800,50084,277996,1513104,8106632, 42869740,224232436,1161920760,5972173872, 30479422388,154582269500,779632820512, 3912450838808,19545592617532,97246103407556, 482032538140680] |