n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 21 |
6 | 81 |
7 | 351 |
8 | 1233 |
9 | 46089 |
10 | 434241 |
11 | 2359611 |
12 | 27387801 |
13 | 264333213 |
14 | 1722161169 |
15 | 16514298711 |
16 | 163094452641 |
17 | 1216239520401 |
18 | 50883607918593 |
19 | 866931703203699 |
20 | 8473720481213481 |
21 | 166915156382509221 |
22 | 2699805625227141201 |
23 | 28818706120636531023 |
24 | 439756550972215638129 |
25 | 6766483260087819272601 |
26 | 77096822666547068590401 |
27 | 3568144263578808757678251 |
[1,1,1,3,9,21,81,351,1233,46089,434241,2359611, 27387801,264333213,1722161169,16514298711, 163094452641,1216239520401,50883607918593, 866931703203699,8473720481213481, 166915156382509221,2699805625227141201, 28818706120636531023,439756550972215638129, 6766483260087819272601,77096822666547068590401, 3568144263578808757678251] |