n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 36 |
4 | 508 |
5 | 10020 |
6 | 253804 |
7 | 7853076 |
8 | 287078908 |
9 | 12106864260 |
10 | 578586544204 |
11 | 30901130685876 |
12 | 1823983173981148 |
13 | 117911755067635620 |
14 | 8284976875099852204 |
15 | 628692318063511556436 |
16 | 51240154266491883376828 |
17 | 4464155216699369664399300 |
18 | 414013560595951627772296204 |
19 | 40722939746084736801890208756 |
[1,4,36,508,10020,253804,7853076,287078908, 12106864260,578586544204,30901130685876, 1823983173981148,117911755067635620, 8284976875099852204,628692318063511556436, 51240154266491883376828,4464155216699369664399300, 414013560595951627772296204, 40722939746084736801890208756] |