n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 9 |
5 | 56 |
6 | 185 |
7 | 1632 |
8 | 7217 |
9 | 81664 |
10 | 451089 |
11 | 6241280 |
12 | 41375609 |
13 | 676506624 |
14 | 5232134921 |
15 | 98709925888 |
16 | 872492313825 |
17 | 18655203885056 |
18 | 185503858236065 |
19 | 4432984678858752 |
20 | 48978641359097705 |
21 | 1293646660855398400 |
22 | 15722400263686662105 |
23 | 454816628946740707328 |
[1,1,4,9,56,185,1632,7217,81664,451089,6241280, 41375609,676506624,5232134921,98709925888, 872492313825,18655203885056,185503858236065, 4432984678858752,48978641359097705, 1293646660855398400,15722400263686662105, 454816628946740707328] |