n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 25 |
5 | 181 |
6 | 1201 |
7 | 10291 |
8 | 97777 |
9 | 1013545 |
10 | 12202561 |
11 | 151573951 |
12 | 2173233481 |
13 | 31758579997 |
14 | 524057015665 |
15 | 8838296029291 |
16 | 164416415570401 |
17 | 3145357419120721 |
18 | 65057767274601217 |
19 | 1391243470549894135 |
20 | 31671795881695430521 |
21 | 747996624368605997701 |
[1,1,1,7,25,181,1201,10291,97777,1013545,12202561, 151573951,2173233481,31758579997,524057015665, 8838296029291,164416415570401,3145357419120721, 65057767274601217,1391243470549894135, 31671795881695430521,747996624368605997701] |